Which property was used to simplify the expression? 3c+9+4c=3c+4c+9
1 answer:
Answer:
The change that happened from the first half of the equation to the second half was you moved the 9 and the 4c around.
Commutative property of addition allows you to do that. It's what says that 2+3 is the same thing as 3+2
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