81=2x+1

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Solution for 81=2x+1 equation: 



81=2x+1

We move all terms to the left:

81-(2x+1)=0

We get rid of parentheses

-2x-1+81=0

We add all the numbers together, and all the variables

-2x+80=0

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

-2x=-80

x=-80/-2

x=+40

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