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OpenStudy (anonymous):
Samuel is 1/2 as old as his brother. In seven years, he will be 2/3 as old as his brother will be. Find their present ages. Show each step of your work.
OpenStudy (jhannybean):
Make a set of linear equations, one for sam's age and one for their ages together after 17 years.
OpenStudy (anonymous):
i dont get it...
OpenStudy (anonymous):
Let x = samuel's age
y = his brothers
In 7 years samuel will be x+7, and his brother will be y+7, you can let samuel be x=1/2y
I think you can finish it off from here.
OpenStudy (anonymous):
Notice in 7 years he will be 2/3 as old as his brother, so set the equations up now.
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OpenStudy (jhannybean):
Sam = x
brother = y
x=\(\frac{1}{2}\)y
17 years later, both their ages increase.
x+17 = \(\frac{2}{3}\)(y+17)
OpenStudy (anonymous):
Yeah.
OpenStudy (anonymous):
Oh, ok I understand now
OpenStudy (jhannybean):
Well crap I was typing it out but had my variables mixed up.
Key component `sam will be 2/3 as old as his brother`
OpenStudy (anonymous):
Where do you keep getting 17 years
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OpenStudy (jhannybean):
Oh hahahaha
OpenStudy (anonymous):
hahaha
OpenStudy (jhannybean):
I meant 7 :<
OpenStudy (anonymous):
its ok
OpenStudy (anonymous):
so just plug in 7 instead of 17, then it will be the same, or did everything just blow in our face @Jhannybean
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