-42=-u/8

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Solution for -42=-u/8 equation: 



-42=-u/8

We move all terms to the left:

-42-(-u/8)=0

We get rid of parentheses

u/8-42=0

We multiply all the terms by the denominator


u-42*8=0

We add all the numbers together, and all the variables

u-336=0

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

u=336

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