Rafael counted a total of 40 white cars and yellow cars. there were 9 times as many white cars and yellow. how many white cars did rafeal count

The number of white cars that Rafeal counted is .

Further explanation:

It is given that the total number of white and yellow cars is and the number of white cars is the number of yellow cars.

Suppose the number of white cars is denoted by and the number of yellow cars is denoted by .

Now we can form two equation with the given information.

The sum of the white and yellow cars is that means the summation of and is and in the equation form it can be written as follows:

      .....(1)                                                                                                                                

Now for the formation of second equation the information which is given is the white cars are as many as yellow cars. So the second equation is formed as follows:

          .....(2)

Now substitute the value of from equation (2) to equation (1) to obtain the value of as follows:

From the above calculation the value of is which means the number of yellow car is .

Now substitute the above value of in equation (2) to obtain the value of as follows:

Therefore, the value of is .

This implies that the total number of white cars is .

From the above solution it is concluded that the number of white cars counted by Rafael is .

Learn more:

1. Learn more about the simplified form:

2. Problem on equation:

3. Problem on to find the value in an equation:

Answer details:

Grade: Middle school

Subject: Mathematics

Chapter: Linear equations

Keywords: Equation, white car, yellow car, counting, number, Rafael, total, variables, x, y, 40, 9, summation, substitution, division, notation, nine times.

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step-by-step explanation:

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