42=6-4u

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Solution for 42=6-4u equation: 



42=6-4u

We move all terms to the left:

42-(6-4u)=0

We add all the numbers together, and all the variables

-(-4u+6)+42=0

We get rid of parentheses

4u-6+42=0

We add all the numbers together, and all the variables

4u+36=0

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

4u=-36

u=-36/4

u=-9

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