Atextbook store sold a combined total 402 of psychology and math textbooks in a week. the number of psychology textbooks sold was two times the number of math textbooks sold. how many textbooks of each type were sold?

The number of textbooks of each type were sold is 134 math and 268 psychology books.

Step-by-step explanation:

Given:

Total number of math and psychology textbooks sold in a week is 402.

Now, let the number of math textbooks sold be .

And, the number of psychology textbooks be .

According to question:

Dividing both sides by 3 we get:

So, total number of math textbooks were 134 .

And, total number of psychology textbooks were

                                                                                 .

Therefore, the number of textbooks of each type were sold is 134 math and 268 psychology books.

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