300/x= 1.5*280/x+2
Multiply both sides of the equation by x (x+2): 300 (x+2) =1.5 * 280x.
300x+600=420x
120x=600
x=5
∴ The price of class A ticket is: 420/5+2=40 yuan.
A: The price of the first-class ticket is 40 yuan.