81=u/8+3

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Solution for 81=u/8+3 equation: 



81=u/8+3

We move all terms to the left:

81-(u/8+3)=0

We get rid of parentheses

-u/8-3+81=0

We multiply all the terms by the denominator


-u-3*8+81*8=0

We add all the numbers together, and all the variables

-1u+624=0

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

-u=-624

u=-624/-1

u=+624

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