90+x=10x-9

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Solution for 90+x=10x-9 equation: 



90+x=10x-9

We move all terms to the left:

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

We get rid of parentheses

x-10x+9+90=0

We add all the numbers together, and all the variables

-9x+99=0

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

-9x=-99

x=-99/-9

x=+11

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