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-2u+13.9=1.1
We move all terms to the left:
-2u+13.9-(1.1)=0
We add all the numbers together, and all the variables
-2u+12.8=0
We move all terms containing u to the left, all other terms to the right
-2u=-12.8
u=-12.8/-2
u=6+0.8/2
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