3-x=12+2x

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Solution for 3-x=12+2x equation: 



3-x=12+2x

We move all terms to the left:

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

We add all the numbers together, and all the variables

-x-(2x+12)+3=0

We add all the numbers together, and all the variables

-1x-(2x+12)+3=0

We get rid of parentheses

-1x-2x-12+3=0

We add all the numbers together, and all the variables

-3x-9=0

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

-3x=9

x=9/-3

x=-3

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