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# Help! Answer needed. Due tomorrow.

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Billy is $\frac15$ of his brother's age. In $9$ years, Billy will be $\frac12$ of his brother's age. What is the sum of their current ages, in years?

Jul 24, 2021

#1
+34376
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b = 1/5 s      s = sibling

b+9 = 1/2 (s+9)      sub in the red equation

1/5s + 9 = 1/2s + 4.5

4.5 = .3s

s = 15 y/o    b = 1/5 (15) = 3 y/o     You can finish......

Jul 24, 2021
#2
-1

Jul 24, 2021
#3
+34376
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ElectricPavlov  Jul 24, 2021
#6
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Dead Head ... I was wondering if he is Grateful, but ...

Guest Jul 24, 2021
#4
-1

Jul 24, 2021
#7
+1

Guest Jul 24, 2021
#9
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3+7 = 10 and that's wrong

Jul 24, 2021
#10
+34376
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s = 15 y/o    b = 1/5 (15) = 3 y/o     You can finish......

Jul 24, 2021
#11
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Fie wtvr. I gave up. I'm an idiot. So what?

Jul 25, 2021