Prove: if a+c=b+c, then a=b.
Statement 1: a+c=b+c
Statement 2: a+c + (-c) = b+c + (-c)
Statement 3: a+[c + (-c) ]=b+[c (-c) ]
Statement 4: a+0=b+0
Statement 5: a=b.
What is the reason for Statement 2?
a. Property of opposites
b. Associative property of addition
c. Addition property of equality
d. Identify property of addition
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