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81.6425=0.85u
We move all terms to the left:
81.6425-(0.85u)=0
We add all the numbers together, and all the variables
-(+0.85u)+81.6425=0
We get rid of parentheses
-0.85u+81.6425=0
We move all terms containing u to the left, all other terms to the right
-0.85u=-81.6425
u=-81.6425/-0.85
u=96+0.042500000000004/0.85
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