10x+9=x-9

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Solution for 10x+9=x-9 equation: 



10x+9=x-9

We move all terms to the left:

10x+9-(x-9)=0

We get rid of parentheses

10x-x+9+9=0

We add all the numbers together, and all the variables

9x+18=0

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

9x=-18

x=-18/9

x=-2

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