Question

Jolie used a $20 gift certificate to help pay for dinner for herself and a friend after an 18% tip was added to the bill the $20 was deducted the amount she paid was $8.90 what was the original bill

Answer 1

T = total bill = 20 + 8.90 = $28.90
O = original bill

O * 1.18 = T
O * 1.18 = 28.90
O = 28.90 / 1.18
O = $24.49