The owner charges $55 per haircut.
Work Step by Step
$x+20 = y$ $12x+6y = 750$ $12x+6*(x+20) = 750$ $12x+6x+120 = 750$ $18x +120 =750$ $18x+120-120 = 750 -120$ $18x = 630$ $18x/18 = 630/18$ $x = 35$ $x+20 = y$ $35 + 20= 55= y$
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