Jamal uses the steps below to solve the equation 6x - 4 = 8.
Step 1: 6x - 4 + 4 = 8 + 4
Step 2: 6x + 0 = 12
Step 3: 6x = 12
Step 4: =
Step 5: 1x = 2
Step 6: x = 2
Which property justifies Step 3 of his work?
A). the addition property of equality
B). the identity property of addition
C). the multiplication property of equality
D). the identity property of multiplication
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