#### Answer

Owner charges $55 per haircut.

#### Work Step by Step

Use the information given to make two equations:x=a+20 and 12a+6x=750.Solve for X to find the price per haircut:
12a+6(a+20)=750 -plug in the first equation into the second-
12+6a+120=750 -distribute-
18a+120=750 -simplify like terms-
18a=630 -subtract 120 from both sides-
a=35
Plug in a=35 into one of the equations:
x=35+20
x=55
Each haircut is $55.