Which equation is an identity?
3(x - 1) = x + 2(x + 1) + 1
x-4x + 1) = -3(x + 1) + 1
2x+3 = 2(4x + 2) + 2
(6x – 3) = 3(x + 1) - x-2

You went to a restaurant and spent $53.25 on the meal. there was a 6% sales tax. what was the amount of money, not including a tip, you spent at the restaurant?