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(U)=2.0U-4.0U
We move all terms to the left:
(U)-(2.0U-4.0U)=0
We add all the numbers together, and all the variables
U-(-2U)=0
We get rid of parentheses
U+2U=0
We add all the numbers together, and all the variables
3U=0
U=0/3
U=0
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