Mary is 3 times as old as bhwana ,and the sum of their ages 5 years from now will be twice mary's present age.how old are they now?

Solution；

Age of Mary: 3x

Age of bhwana: x

So the equation is

3x+x - 5*2 = 2*3x

So

x = 5

So

Age of Mary: 15 yrs old

Age of bhwana: 5 yrs old

Hi, the equation should be "3x+x + 5*2 = 2*3x", not "3x+x - 5*2 = 2*3x", thanks