Simplify each expression. Justify each step. 1. (12 + 8x) + 13 2. (7-7) + 12 3. (5 x m) x 7



Simplify each expression. Justify each step.
1. (12 + 8x) + 13
2. (7-7) + 12
3. (5 x m) x 7




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