Question

A textbook store sold a combined total of 248 math and history textbooks in a week. The number of history textbooks sold was 68 less than the number of math textbooks sold. How many textbooks of each type were sold?

Answer 1

x = math
y = history
x + y = 248
x + x - 68 = 248
2x = 316
x = 158
y = 90
There were 158 math textbooks sold and 90 history textbooks sold.