Question

A textbook store sold a combined total of 255 sociology and physiology textbooks in a week. The number of sociology textbooks sold was two times the number of physiology textbooks sold. How many textbooks of each type were sold?

Answer 1

75 physiology Textbook was sold and 150 sociology textbook was sold

Explanation:

Let x represent textbook

2x + x = 225

⇒3x = 225

⇒
`\sf \frac{\sout{3}x}{\sout{3}} = (225)/(3)`

⇒x = 75

75 textbooks for physiology

To find How many textbook for sociology

Multiply 2 by the amount of physiology

⇒2 × 75

⇒150 sociology textbook