3x+40=x-12

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Solution for 3x+40=x-12 equation: 



3x+40=x-12

We move all terms to the left:

3x+40-(x-12)=0

We get rid of parentheses

3x-x+12+40=0

We add all the numbers together, and all the variables

2x+52=0

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

2x=-52

x=-52/2

x=-26

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