Question

A parking lot has a total of 60 cars and trucks. the ratio of cars to trucks is 7:3. how many cars are in the parking lot? how many trucks are in the parking lot? justify your answers.

Answer 1

A) c + t = 60
B) 3c = 7t
Multiplying A) by -3
A) -3c + -3t = -180 then adding this to b
B) 3c = 7t
180 = 10t
trucks = 18
cars = 42