-5x-4+7x=-12

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Solution for -5x-4+7x=-12 equation: 



-5x-4+7x=-12

We move all terms to the left:

-5x-4+7x-(-12)=0

We add all the numbers together, and all the variables

2x+8=0

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

2x=-8

x=-8/2

x=-4

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