70=7m-21

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Solution for 70=7m-21 equation: 



70=7m-21

We move all terms to the left:

70-(7m-21)=0

We get rid of parentheses

-7m+21+70=0

We add all the numbers together, and all the variables

-7m+91=0

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

-7m=-91

m=-91/-7

m=+13

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