-4=x+3=12

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



-4=x+3=12

We move all terms to the left:

-4-(x+3)=0

We get rid of parentheses

-x-3-4=0

We add all the numbers together, and all the variables

-1x-7=0

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

-x=7

x=7/-1

x=-7

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