SOLUTION: Bob is 9 years old and his brother is five. How many years will go by before bob is five-fourths his brother's age?

Algebra ->  Customizable Word Problem Solvers  -> Age -> SOLUTION: Bob is 9 years old and his brother is five. How many years will go by before bob is five-fourths his brother's age?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1013884: Bob is 9 years old and his brother is five. How many years will go by before bob is five-fourths his brother's age?
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Call the number of years in the future, x.
Then we can write
9 + x = (5/4)(x + 5)
9 + x = (5/4)x + 25/4
Now subtract x and subtract 25/4 from 9 and get
11/4 = 1/4 x
x = 11 years from now