If Michael were six years older, he would be four times as old as Isaac. Isaac is 39 years younger than Michael. How old is Michael?
+865 Michael = x.
Isaac = x-39.
x + 6 = 4 (x - 39)
x + 6 = 4x - 156
x - 4x = - 156 - 6
-3x = -162
3x = 162
x = 54.
Michael is 54 years old.
54 - 39 = 15.
54 + 6 = 60
15 * 4 = 60
