X+3=12+2x

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



X+3=12+2X

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

X-2X-12+3=0

We add all the numbers together, and all the variables

-1X-9=0

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

-X=9

X=9/-1

X=-9

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