261=81+9x

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Solution for 261=81+9x equation: 



261=81+9x

We move all terms to the left:

261-(81+9x)=0

We add all the numbers together, and all the variables

-(9x+81)+261=0

We get rid of parentheses

-9x-81+261=0

We add all the numbers together, and all the variables

-9x+180=0

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

-9x=-180

x=-180/-9

x=+20

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