general ability
posted by cindy on .
Stephen is 14 years old. In 13 years time he will be 3 fifths as old as his father will be then. How old is his father now?
a) 32
b) 27
c) 26
d) 30

let his father's present age be x years
14 + 13 = 3/5(x+13)
Solve.