-7x+9=81-x

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Solution for -7x+9=81-x equation: 



-7x+9=81-x

We move all terms to the left:

-7x+9-(81-x)=0

We add all the numbers together, and all the variables

-7x-(-1x+81)+9=0

We get rid of parentheses

-7x+1x-81+9=0

We add all the numbers together, and all the variables

-6x-72=0

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

-6x=72

x=72/-6

x=-12

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