Question 38989
5 sons --> x, x+3, x+6, x+9, x+12
Age of the oldest in 3 years = x+12+3=x+15
Equation:
x+15=3(x+3)
x+15=3x+9
-2x=-6
x=3
Hence, the yougest son is 3 (add 3 to each of the other sons ages)
Paul.