1.

3m+2(m+2)=20-(2m-5) In the second step- 3m+2m+4=20- 2m+5, how did 20-(2m-5) become 20-2m+5

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3m+2(m+2)=20-(2m-5)

In the second step- 3m+2m+4=20- 2m+5, how did 20-(2m-5) become 20-2m+5



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