Problema Solution

Over the last 3 evenings, Salma received a total of 55 phone calls at the call center. The second evening, she received 2 times as many calls as the third evening. The third evening, she received 9 more calls than the first evening. How many phone calls did she receive each evening

Answer provided by our tutors


x = number of calls on the 1st evening

y = number of calls on the 2nd evening

z = number of calls on the 3rd evening

We can write the following system of equations:

x + y + z = 55

y = 2z

z = x + 9


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x = 7 calls received on the 1st evening

y = 32 calls received on the 2nd evening

z = 16 calls received on the 3rd evening