2x+3=12+3x

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



2x+3=12+3x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

2x-3x-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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