There are four times as many girls in a chemistry class as there are boys. if there are 45 students in the class, how many boys are in the class? type your answer in the box below.

In order to determine the number of boys in the class, first, we set-up an algebraic equation. Let x = number of boys in the class. The equation is then: x + 4x = 45. This is because the number of girls is 4 times greater than the number of boys. After solving the algebraic equation, it is then determined that there are 9 boys in the Chemistry class.   

Do the inverse operation