Question

Over the last three evenings, Yolanda received a total of 105 phone calls at the call center. The first evening, she received 9 more calls than the second evening. The third evening, she received 4 times as many calls as the second evening. How many phone calls did she receive each evening?

Answer 1

Day 1: 25, Day 2: 16, Day 3: 64

Explanation:

First you need to form an equation using unknowns, below i have used x to represent the number of calls

Day 1: x+9

Day 2: x

Day 3: 4x

105-9 (as day 1 is x+9) = 96

4 + 1 + 1 = 6 (6x)

96/6 = 16

x = 16, so Day 2 = 16

16 + 9 = 25

16 x 4 = 64

To check, 16 + 25 + 64 = 105

Hope this helps :D