Question 878412
Bobby is 11 years old, exactly 1/3 as old as his mother. In how many years will he be 1/2 as old as she?
let x=number of years Bobby will he be 1/2 as old as his mother
Bobby's present age=11
mother's present age=33
..
{{{(11+x)/(33+x)=1/2}}}
22+2x=33+x
x=11
number of years Bobby will he be 1/2 as old as his mother=11