-4=8-4u

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Solution for -4=8-4u equation: 



-4=8-4u

We move all terms to the left:

-4-(8-4u)=0

We add all the numbers together, and all the variables

-(-4u+8)-4=0

We get rid of parentheses

4u-8-4=0

We add all the numbers together, and all the variables

4u-12=0

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

4u=12

u=12/4

u=3

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