9=2-10x-8x+21

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Solution for 9=2-10x-8x+21 equation: 



9=2-10x-8x+21

We move all terms to the left:

9-(2-10x-8x+21)=0

We add all the numbers together, and all the variables

-(-18x+23)+9=0

We get rid of parentheses

18x-23+9=0

We add all the numbers together, and all the variables

18x-14=0

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

18x=14

x=14/18

x=7/9

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