m+(m-1)=7

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Solution for m+(m-1)=7 equation: 



m+(m-1)=7

We move all terms to the left:

m+(m-1)-(7)=0

We get rid of parentheses

m+m-1-7=0

We add all the numbers together, and all the variables

2m-8=0

We move all terms containing m to the left, all other terms to the right

2m=8

m=8/2

m=4

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