Question 1058088
Let x represent the number of calls received on the second evening.


The number of calls received on the first evening is x - 10.


The number of calls received on the third evening is 2x.


The sum of calls received on the three evenings is (x - 10) + x + 2x, and this is equal to 50:


(x - 10) + x + 2x = 50


4x - 10 = 50


4x = 50 + 10


4x = 60


x = 60/4


x = 15


The number of calls received on each evening is then:


First evening: x - 10 = 15 - 10 = 5


Second evening: x = 15


Third evening: 2x = 2(15) = 30


Check: 5 + 15 + 30 = 60