12x-4=(-40)

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Solution for 12x-4=(-40) equation: 



12x-4=(-40)

We move all terms to the left:

12x-4-((-40))=0

We add all the numbers together, and all the variables

12x+36=0

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

12x=-36

x=-36/12

x=-3

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