Gerrys age is 5 more than three times Carols age. If the sum of their age is 45, how old is carol?

Answer 1

Let g = Gerry's age and c = Carol's age

g = 3c + 5

g+c = 45

Substitute for g from the first equation into the second equation.

3c+5 + c = 45 --> 4c = 40 --> c = 40/4 = 10

g = 3(10) + 5 = 35

Carol is 10.