there were twice a many black cars as red cars in the parking lot. there were 36 total black or red cars in the parking lot. How many red and how many black are there?
Let r = red cars
r + 2r = 36
3r = 36
r = 12
R equals 12
B equals 24
To find the number of black and red cars in the parking lot, we can set up a system of equations based on the information given. Let's let 'b' represent the number of black cars and 'r' represent the number of red cars.
Given that there were twice as many black cars as red cars, we can write the equation:
b = 2r (equation 1)
We're also told that the total number of black and red cars in the parking lot is 36:
b + r = 36 (equation 2)
Now, we can solve the system of equations to find the values of 'b' and 'r'.
Substitute equation 1 into equation 2:
(2r) + r = 36
3r = 36
r = 12
Using equation 1, substitute the value of 'r' you just found:
b = 2(12)
b = 24
Therefore, there are 24 black cars and 12 red cars in the parking lot.