Question

There are 72 South American animals in the Springdale zoo. Thats is more than half the number of African animals in the zoo. Write an equation you could use to find n, the number of animals in the zoo.

Answer 1

172 = 1/2 * x + 45
172 = 1/2x + 45             / - 45 (both sides)
127 = 1/2x                    / * 2 (both sides)
x = 254