78=-2(x+3)

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



78=-2(x+3)

We move all terms to the left:

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



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

-2(x+3)

We multiply parentheses

-2x-6

Back to the equation:

-(-2x-6)



We get rid of parentheses

2x+6+78=0

We add all the numbers together, and all the variables

2x+84=0

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

2x=-84

x=-84/2

x=-42

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