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3u+3.8=5u
We move all terms to the left:
3u+3.8-(5u)=0
We add all the numbers together, and all the variables
-2u+3.8=0
We move all terms containing u to the left, all other terms to the right
-2u=-3.8
u=-3.8/-2
u=1+1/1.1111111111111
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