78=-2(m+3)=m

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Solution for 78=-2(m+3)=m equation: 



78=-2(m+3)=m

We move all terms to the left:

78-(-2(m+3))=0



We calculate terms in parentheses: -(-2(m+3)), so:

-2(m+3)

We multiply parentheses

-2m-6

Back to the equation:

-(-2m-6)



We get rid of parentheses

2m+6+78=0

We add all the numbers together, and all the variables

2m+84=0

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

2m=-84

m=-84/2

m=-42

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