4x+12=7-x

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Solution for 4x+12=7-x equation: 



4x+12=7-x

We move all terms to the left:

4x+12-(7-x)=0

We add all the numbers together, and all the variables

4x-(-1x+7)+12=0

We get rid of parentheses

4x+1x-7+12=0

We add all the numbers together, and all the variables

5x+5=0

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

5x=-5

x=-5/5

x=-1

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