7=b+-81

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Solution for 7=b+-81 equation: 



7=b+-81

We move all terms to the left:

7-(b+-81)=0

We add all the numbers together, and all the variables

-(b-81)+7=0

We get rid of parentheses

-b+81+7=0

We add all the numbers together, and all the variables

-1b+88=0

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

-b=-88

b=-88/-1

b=+88

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