4+x-3x=-12

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Solution for 4+x-3x=-12 equation: 



4+x-3x=-12

We move all terms to the left:

4+x-3x-(-12)=0

We add all the numbers together, and all the variables

-2x+16=0

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

-2x=-16

x=-16/-2

x=+8

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