2u=7u-81

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Solution for 2u=7u-81 equation: 



2u=7u-81

We move all terms to the left:

2u-(7u-81)=0

We get rid of parentheses

2u-7u+81=0

We add all the numbers together, and all the variables

-5u+81=0

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

-5u=-81

u=-81/-5

u=16+1/5

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