Asked by Donovan
A certain parking lot has red, white, and blue cars. The number of red cars is 3 more than the number of white cars, and the number of blue cars is 2 times the number of red cars. What could be the total number of cars in the lot?
19, 20, 21, or 22?
19, 20, 21, or 22?
Answers
Answered by
oobleck
r=w+3
b = 2r
so the total number of cars is w + w+3 + 2(w+3) = 4w+9
21 = 4*3 + 9
b = 2r
so the total number of cars is w + w+3 + 2(w+3) = 4w+9
21 = 4*3 + 9
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