Question

A is twice as old as B. When 6 is subtracted from B's age and 4 is added to A's age, A's age will be four times B's age. How old are they?

Answer 1

2x-4 = 4(x-6)

or, 2x-4= 4x-24

or, 2x-4x = -24+4

or, -2x = -20

or, x = -20/-2

or, x = 10

again,

as we let A = 2x and B = x

the age of A = 2x = 2*10 = 20 yrs.

the age of B = x = 10 yrs.