80=7x+9

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Solution for 80=7x+9 equation: 



80=7x+9

We move all terms to the left:

80-(7x+9)=0

We get rid of parentheses

-7x-9+80=0

We add all the numbers together, and all the variables

-7x+71=0

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

-7x=-71

x=-71/-7

x=10+1/7

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