9+3x=12+x

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Solution for 9+3x=12+x equation: 



9+3x=12+x

We move all terms to the left:

9+3x-(12+x)=0

We add all the numbers together, and all the variables

3x-(x+12)+9=0

We get rid of parentheses

3x-x-12+9=0

We add all the numbers together, and all the variables

2x-3=0

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

2x=3

x=3/2

x=1+1/2

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