9x+2x=689-x

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Solution for 9x+2x=689-x equation: 



9x+2x=689-x

We move all terms to the left:

9x+2x-(689-x)=0

We add all the numbers together, and all the variables

9x+2x-(-1x+689)=0

We add all the numbers together, and all the variables

11x-(-1x+689)=0

We get rid of parentheses

11x+1x-689=0

We add all the numbers together, and all the variables

12x-689=0

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

12x=689

x=689/12

x=57+5/12

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