The total toll charge for one car and five bicycles to cross a bridge is $7.50. The toll for a car is $1.50 more than for a bicycle. Find the cost for a car to cross the bridge.

Answer 1

cost for bike --- x
cost for car --- x + 1.5

x + 5(x+1.5) = 7.5
x + 5x + 7.5 = 7.5
6x = 0
x = 0

A bike costs nothing and a car costs $1.50

by common sense:
Since the extra charge for the 5 cars would have been 5(1.5) or 7.50, but 7.50 was the total, the bikes must have been free.

Answer 2

You read the question wrong