U=40+3x

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Solution for U=40+3x equation: 



=40+3U

We move all terms to the left:

-(40+3U)=0

We add all the numbers together, and all the variables

-(3U+40)=0

We get rid of parentheses

-3U-40=0

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

-3U=40

U=40/-3

U=-13+1/3

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