Question 1057485
 In 8 years, a boy will be three times as old as he was 4 years ago.
 Find his present age.
:
let a = his present age
Write an equation for exactly what it says
a + 8 = 3(a - 4)
a + 8 = 3a - 12
8 + 12 = 3a - a
20 = 2a
a = 20/2
a = 10 yrs is his present age
;
;
see if it works
10 + 8 = 3(10 - 4)
18 = 3(6)