A sports bag has 40 golf balls. Some are yellow and some are white. There are 7 white golf balls for every yellow golf ball. How many white golf balls are there in the bag.

35 white balls.

Step-by-step explanation:

you need to multiply 7 * some constant c and do the same to 1. The total has to come out to 40

7*c + c = 40 Combine the terms on the left.

8c = 40 Divide by 8

8c/8 = 40/8

c = 5

So the balls are in the ratio of

5*7 + 5 = 40