The steps for solving the equation 2x - 3 = 7 are listed below: step justification step 1: 2x - 3 = 7 given step 2: 2x - 3 + 3 = 7 + 3 step 3: 2x + 0 = 7 + 3 step 4: 2x = 10 step 5: step 6: x = 5 which property should be cited as justification for step 2? a. associative property of addition b. additive identity property c. addition property of equality d. additive inverse property