Problema Solution
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A textbook store sold a combined total of
429
math and psychology textbooks in a week. The number of math textbooks sold was
45
more than the number of psychology textbooks sold. How many textbooks of each type were sold?
Answer provided by our tutors
Let
x = the number of psychology textbooks sold
y = the number of math textbooks sold
x + y = 429
y = x + 45
........
click here to see the system of equations solved for x and y
........
x = 192 psychology textbooks
y = 237 math textbooks
There were 192 psychology and 237 math textbooks sold.