Let old man=3x years old
old man =3x+16 years old now
let his wife = x years old
his wife =x+16 years old now
3x+16/x+16 = 2
3x+16 = 2(x + 16)
3x + 16 = 2x + 32
3x - 2x = 32 - 16
x=16
.'.his wife is 16+16 years old =32 NOW
the old man is 32x2=64 years old now