The difference between the prices of a coach ticket and a first class ticket is $135. If the cost of a first class ticket is 175% of the cost of a coach ticket, what is the cost of a coach ticket?

Answer 1

x = cost coach

y = cost first class

y - x = 135

y = 1.75x

substitute value for y in 2nd equation for y in 1st equation

1.75x - x = 135

0.75x = 135

x = 180

coach ticket is $180