(80-x)=9x

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Solution for (80-x)=9x equation: 



(80-x)=9x

We move all terms to the left:

(80-x)-(9x)=0

We add all the numbers together, and all the variables

(-1x+80)-9x=0

We add all the numbers together, and all the variables

-9x+(-1x+80)=0

We get rid of parentheses

-9x-1x+80=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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