Rafael counted a total of 40 white cars and yellow cars there were 9 times as many white cars as yellow car how many white cars

Question

Nadusha1986 [10]

3 years ago

9

Rafael counted a total of 40 white cars and yellow cars there were 9 times as many white cars as yellow car how many white cars

did Rafael count

Mathematics

2 answers:

konstantin123 [22] · Answer 1 · 2022-05-12T20:27:42+03:00

Solution: The number of white cars counted by Rafael is 36.

Explanation:

Let the number of white cars be x and number of yellow cars be y.

It is given that the total number of yellow and white cars counted by rafael is 40.

$x+y=40$ .....(1)

According to the given information he counts 9 times as many white cars as yellow car. It means the number of white cars counted by rafael is 9 times of the yellow cars.

$x=9y$ ......(2)

Put $x=9y$ in equation (1).

$9y+y=40\\10y=40\\y=4$

Put $y=4$ in equation (1).

$x+4=40\\x=36$

Since x is the number of white cars, therefore number of white cars counted by Rafael is 36.

Yuliya22 [10] · Answer 2 · 2022-05-12T22:15:53+03:00

White cars did Rafael count = 36 cars

<h3><em>Further explanation</em></h3>

A two-variable linear equation system is an equation that involves 2 variables (the value that can change) and the equation has the highest rank of 1

In this equation system there are coefficients and variables whose solutions can use: