129=45+7m

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Solution for 129=45+7m equation: 



129=45+7m

We move all terms to the left:

129-(45+7m)=0

We add all the numbers together, and all the variables

-(7m+45)+129=0

We get rid of parentheses

-7m-45+129=0

We add all the numbers together, and all the variables

-7m+84=0

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

-7m=-84

m=-84/-7

m=+12

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