10-x=9x+90

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



10-x=9x+90

We move all terms to the left:

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

We add all the numbers together, and all the variables

-1x-(9x+90)+10=0

We get rid of parentheses

-1x-9x-90+10=0

We add all the numbers together, and all the variables

-10x-80=0

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

-10x=80

x=80/-10

x=-8

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