80=x+89

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Solution for 80=x+89 equation: 



80=x+89

We move all terms to the left:

80-(x+89)=0

We get rid of parentheses

-x-89+80=0

We add all the numbers together, and all the variables

-1x-9=0

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

-x=9

x=9/-1

x=-9

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