Martin got a haircut yesterday if he pad $27 and left an 18% tip, what was the total bill​

Work Shown:

x = total bill amount ignoring the tip

18% of x = 0.18x = tip amount

x+0.18x = 1.18x = amount Martin paid = 27

1.18x = 27

x = 27/1.18

x = 22.8813559322033 approximately

x = 22.88 dollars was the total bill.

Checking the

18% of 22.88 = 0.18*22.88 = 4.1184 = 4.12

Martin left a tip of $4.12

Add this on top of the bill to get 22.88+4.12 = 27

This matches with the fact he paid $27.

The answer is confirmed.

the 2 figures are congruent bc if you reflect abcd over the y axis then over the d axis the figures overlap

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1