SOLUTION: ann is 7/10 of bob's age. in 4 years and will be 8/11 of bob's age. How old is Bob now?

Algebra ->  Customizable Word Problem Solvers  -> Age -> SOLUTION: ann is 7/10 of bob's age. in 4 years and will be 8/11 of bob's age. How old is Bob now?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 317263: ann is 7/10 of bob's age. in 4 years and will be 8/11 of bob's age. How old is Bob now?
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!

A=%287%2F10%29B
A%2B4=%288%2F11%29%28B%2B4%29
%287%2F10%29B%2B4=%288%2F11%29B%2B%2832%2F11%29
%287%2F10%29B%2B%2844%2F11%29=%288%2F11%29B%2B%2832%2F11%29
%287%2F10%29B%2B%2812%2F11%29=%288%2F11%29B LCD 10*11=110
%2812%2F11%29=%2880%2F110%29B-%2877%2F110%29B
%2812%2F11%29=%283%2F110%29B multiply by 110
120=%283%29Bdivide by 3
60=B
bob is 60 years old
ann is 42 years old