Answer:
step 6 has an algebraic error
let's say the bill without the tip is "x" amount, so that'd be the 100% of the bill, but we also know that 4.50 is the 18% of "x".
so if 4.50 is the 18% of "x", how much is "x"?

C. 4258.44 yd3 if u multiple then bring it down thre subtract
Hey i don’t wanna do math right now but there’s a link that i could post in the comments if you want it