3x+5=(-1x)-7

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Solution for 3x+5=(-1x)-7 equation: 



3x+5=(-1x)-7

We move all terms to the left:

3x+5-((-1x)-7)=0



We calculate terms in parentheses: -((-1x)-7), so:

(-1x)-7

We get rid of parentheses

-1x-7

Back to the equation:

-(-1x-7)



We get rid of parentheses

3x+1x+7+5=0

We add all the numbers together, and all the variables

4x+12=0

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

4x=-12

x=-12/4

x=-3

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