23-4x would be the value of f(x-5)
Y = 3/4x - 5/2....subtract 3/4x from both sides
-3/4x + y = -5/2 ....multiply everything by common denominator of 4
-3x + 4y = -10
I believe it would come to $64.78
59.99*18%=4.79
59.99+.79=64.78
Hope this helps
Answer is 100.8 pieces. hope this helps a lot