Ralph counted 40 white and yellow cars. There were 9 times as many white cars than yellow cars. How many white cars did ralph count?

Question

This is hard for me

 

Answer 1

Hello Mackenzie

 

w + y = 40

 

w = 9y

 

Substitute w = 9y into the first equation, you get

 

9y + y = 40

 

10y = 40

 

y = 40/10 = 4

 

w = 9y = 9 x 4 = 36

 

There are 4 yellow cars and 36 white cars.