3x+12=x-7

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Solution for 3x+12=x-7 equation: 



3x+12=x-7

We move all terms to the left:

3x+12-(x-7)=0

We get rid of parentheses

3x-x+7+12=0

We add all the numbers together, and all the variables

2x+19=0

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

2x=-19

x=-19/2

x=-9+1/2

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