jjj344
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| Joined: 19 Dec 2010 |
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| 08 Sep 2015 05:19 PM |
Hope you can solve it since it sounds so confusing.
Maggie's brother is 3 years younger than twice her age. The sum of their age is 24. How old is Maggie? |
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jjj344
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| Joined: 19 Dec 2010 |
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| 08 Sep 2015 05:20 PM |
| It sounds like they want me to solve Maggie's brothers age but in reality, their wondering how old is Maggie. Am I suppose to find out her brothers age first? |
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| 08 Sep 2015 05:20 PM |
Bet this is your homework.
Shut up and take my Scavenger Toad Meat!/http://www.roblox.com/laloblox111-item?id=291748319 |
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jjj344
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| Joined: 19 Dec 2010 |
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| 08 Sep 2015 05:21 PM |
| It is. I just need some help since my Math Class is like 1st Period. |
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| 08 Sep 2015 05:21 PM |
Her brother is 2m - 3
m + 2m - 3 = 24 3m = 27 m = 9
Maggie is 9 and her brother is 15.
Do the math. 2 * 10 - 3 <> 14 |
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| 08 Sep 2015 05:21 PM |
dude this is grade 4 math lol
#Kanye2020| Hello ladies and germs, wait a second, what is randy orton doing in a place like this. OH MY RKOOO |
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| 08 Sep 2015 05:21 PM |
24 / 2 - 3 Maggie is 9. Her brother is 15. |
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| 08 Sep 2015 05:28 PM |
You're 9
[sic] [HAIL FERRIS BUELLER] |
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BingoBox
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chtr0192
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| Joined: 19 Aug 2008 |
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| 08 Sep 2015 05:33 PM |
Simple algebra man.
2M-3=24
m-3=12
m=15
she's 15 |
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BingoBox
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jjj344
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| Joined: 19 Dec 2010 |
| Total Posts: 12709 |
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| 08 Sep 2015 05:33 PM |
| Algebra I btw. Not simple math. Wish it was that easy. |
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BingoBox
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chtr0192
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| 08 Sep 2015 05:35 PM |
Crap that's the age of the brother.
to finish (15+3)/2 = 9 |
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chtr0192
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| 08 Sep 2015 05:36 PM |
| After the grade where they learn how to spell "your". |
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jjj344
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| 08 Sep 2015 05:37 PM |
| Solved it. THREAD OFFICALLY CLOSED! |
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BingoBox
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| 08 Sep 2015 05:37 PM |
m + 2m - 3 = 24
because maggie's brother is 2x her age -3
3m - 3 = 24
because u combine like terms
3m = 27
because u add 3 to both sides
m = 9
because u divide both sides by 3 |
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chtr0192
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| Joined: 19 Aug 2008 |
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| 08 Sep 2015 05:38 PM |
| "You" dang nabbit. Bear with me, I'm working off 5 hours of sleep. |
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BingoBox
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chtr0192
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| 08 Sep 2015 05:40 PM |
| Still got it right mane, just didn't finish it. |
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| 08 Sep 2015 05:40 PM |
| dude this is grade 4 math lol |
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| 08 Sep 2015 05:40 PM |
Lmao r you 9?
flooring 7 dayer(+4.8k) |
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| 08 Sep 2015 06:25 PM |
This question is designed to play a trick on your mind by making it seem like the problem is trying to focus on Maggie. However, we must first find the age of her brother. Since the sum of their age is 24, we would use the equation T = M + B to represent their total age.
Next we need to analyze what the problem said. We know that Maggie and her Brother are both variables that equal to 24. We also know that Maggie's brother's age is 3 years younger than twice her age.
However this sounds pretty confusing, so we will translate into mathematical terms. The age of her brother would instead be the same as if you multiplied her age twice (PEMDAS), and then subtracted 3. To represent this, we would use the equation:
B = ((M*2)-3)
Since we do not know what Maggie's age is yet, we would leave her letter 'M' as an unknown variable.
M = ?
Now we would go back to our total age equation, T = M + B, and insert our newly defined variable of B. We would also set the variable T, to 24, as that is their total age. So we would have:
24 = M + ((M*2)-3)
This still looks a bit confusing, so it would be a good idea to simplify the equation using our order of operations. (PEMDAS)
#First we do the operations within the parentheses.
24 = M + (2M - 3)
# We can't subtract 3 from 2M, so we will just leave them like so.
24 = M + 2M - 3
24 = 3M - 3
#Now we need to move the variables #So we can have the like-variables on the same side #This can be done by adding a +3 to the side that has the -3
24 = 3M - 3 + 3
#We must remember to do this to the other side as well in order for the equation to be equal
24 + 3 = 3M
27 = 3M
#Now we must single out the M on the other side, since there are three instances, of it and we only want one.
(27 / 3) = (3M / 3)
#Now we are left with the definition of M
9 = M
Now are variables are:
M = 9 T = 24 B = ((M*2)-3)
#Success! We have found Maggie's age! Now we must test it to be sure we are correct!
24 = M + B
24 = M + ((M*2)-3)
24 = (9) + ((9)*2 - 3)
24 = (9) + (18-3)
24 = (9) + (15)
24 = 24 ✔
//Note that Brian's age is 15, however the question did not ask to find it, so you would not need that information. |
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