-4x-12=40

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Solution for -4x-12=40 equation: 



-4x-12=40

We move all terms to the left:

-4x-12-(40)=0

We add all the numbers together, and all the variables

-4x-52=0

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

-4x=52

x=52/-4

x=-13

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