9+3x=12-4x

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Solution for 9+3x=12-4x equation: 



9+3x=12-4x

We move all terms to the left:

9+3x-(12-4x)=0

We add all the numbers together, and all the variables

3x-(-4x+12)+9=0

We get rid of parentheses

3x+4x-12+9=0

We add all the numbers together, and all the variables

7x-3=0

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

7x=3

x=3/7

x=3/7

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