3-x-4x=-12

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



3-x-4x=-12

We move all terms to the left:

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

We add all the numbers together, and all the variables

-5x+15=0

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

-5x=-15

x=-15/-5

x=+3

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