Question

Over the last three evenings, jina received a total of 84 phone calls at the call center. The first evening, she received 9 more calls than the second evening. The third evening, she received 3 times as many calls as the second evening. How many phone calls did she receive each evening?

Answer 1

Answer: 21

step by step explanation:

say you gave the evenings letters it would help make more sense of it for example

X, Y, and Z represents the 1st , 2nd, and 3rd evenings respectively

X + Y + Z = 85

Y = 3Z

X = z+5

substituting the second and third equations into the first:

z+5 + 3z + z = 85

5z + 5 = 85

5z = 80

z = 16

y = 48

x = 21