Question

A new clothing store is offering 30 free points to customers who sign up for their rewards card. Then for each shirt a customer buys, they earn an additional number of points. Mr. Smith signs up for the rewards card and purchases 3 shirts. He earns 75 points.
How many additional points does a customer earn on purchasing one shirt?

Write an equation that represents the relationship between the number of shirts purchased, n , and the total number of points earned, p .

Answer 1

P = 3n + 30
p = 75
75 = 3n + 30
45 = 3n
n = 15
A customers earns 15 additional points on purchasing one shirt.

Answer 2

p = 3n + 30

p = 75

75 = 3n + 30

45 = 3n

n = 15