Question

ronit is now 32 years old and his son is 7 years old.in how many years will ronit be twice as old as his son .

Answer 1

Let the number of years be x ; then
after x years
(32+x) = 2×(7+x)
32+x = 14+2x
32-14 = 2x-x
x = 18
--------------------------
Hence your answer is 18 years.

Answer 2

let son age be x years...
32 = 2(x+7)
32=2x+14
32-14=2x
18=2x
18/2=x
x=9