Question

A textbook store sold a combined total of 255 math and sociology textbooks in a week. The number

of math textbooks sold was 55 more than the number of sociology textbooks sold. How many textbooks
of each type were sold?

Answer 1

c + s = 258

s = c - 60

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c + s = 258

c + c - 60 = 258

2c - 60 = 258

2c = 318

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c = 159

s = 99

Explanation: