U=-9-2u

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Solution for U=-9-2u equation: 



=-9-2U

We move all terms to the left:

-(-9-2U)=0

We add all the numbers together, and all the variables

-(-2U-9)=0

We get rid of parentheses

2U+9=0

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

2U=-9

U=-9/2

U=-4+1/2

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