-78=-8-7m

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Solution for -78=-8-7m equation: 



-78=-8-7m

We move all terms to the left:

-78-(-8-7m)=0

We add all the numbers together, and all the variables

-(-7m-8)-78=0

We get rid of parentheses

7m+8-78=0

We add all the numbers together, and all the variables

7m-70=0

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

7m=70

m=70/7

m=10

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