42=7u+7

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Solution for 42=7u+7 equation: 



42=7u+7

We move all terms to the left:

42-(7u+7)=0

We get rid of parentheses

-7u-7+42=0

We add all the numbers together, and all the variables

-7u+35=0

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

-7u=-35

u=-35/-7

u=+5

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