6x+3x-8=12-x

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Solution for 6x+3x-8=12-x equation: 



6x+3x-8=12-x

We move all terms to the left:

6x+3x-8-(12-x)=0

We add all the numbers together, and all the variables

6x+3x-(-1x+12)-8=0

We add all the numbers together, and all the variables

9x-(-1x+12)-8=0

We get rid of parentheses

9x+1x-12-8=0

We add all the numbers together, and all the variables

10x-20=0

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

10x=20

x=20/10

x=2

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