u=7u-78

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Solution for u=7u-78 equation: 



u=7u-78

We move all terms to the left:

u-(7u-78)=0

We get rid of parentheses

u-7u+78=0

We add all the numbers together, and all the variables

-6u+78=0

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

-6u=-78

u=-78/-6

u=+13

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