42=14-7u

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Solution for 42=14-7u equation: 



42=14-7u

We move all terms to the left:

42-(14-7u)=0

We add all the numbers together, and all the variables

-(-7u+14)+42=0

We get rid of parentheses

7u-14+42=0

We add all the numbers together, and all the variables

7u+28=0

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

7u=-28

u=-28/7

u=-4

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