U=-4+4a

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Solution for U=-4+4a equation: 



=-4+4U

We move all terms to the left:

-(-4+4U)=0

We add all the numbers together, and all the variables

-(4U-4)=0

We get rid of parentheses

-4U+4=0

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

-4U=-4

U=-4/-4

U=1

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