9-x=10+9

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Solution for 9-x=10+9 equation: 



9-x=10+9

We move all terms to the left:

9-x-(10+9)=0

We add all the numbers together, and all the variables

-x+9-19=0

We add all the numbers together, and all the variables

-1x-10=0

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

-x=10

x=10/-1

x=-10

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