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Mathematics, 25.11.2019 22:31 AndiLizzi

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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Prove: if a+c=b+c, then a=b.
statement 1: a+c=b+c
statement 2: a+c+(-c)=b+c+(-c)
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