3-4=12+x

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Solution for 3-4=12+x equation: 



3-4=12+x

We move all terms to the left:

3-4-(12+x)=0

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

-(x+12)-1=0

We get rid of parentheses

-x-12-1=0

We add all the numbers together, and all the variables

-1x-13=0

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

-x=13

x=13/-1

x=-13

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