40=12-2x

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Solution for 40=12-2x equation: 



40=12-2x

We move all terms to the left:

40-(12-2x)=0

We add all the numbers together, and all the variables

-(-2x+12)+40=0

We get rid of parentheses

2x-12+40=0

We add all the numbers together, and all the variables

2x+28=0

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

2x=-28

x=-28/2

x=-14

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