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+0.5=3U-12.5
We move all terms to the left:
+0.5-(3U-12.5)=0
We get rid of parentheses
-3U+12.5+0.5=0
We add all the numbers together, and all the variables
-3U+13=0
We move all terms containing U to the left, all other terms to the right
-3U=-13
U=-13/-3
U=4+1/3
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