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-7u+19.8=2.3
We move all terms to the left:
-7u+19.8-(2.3)=0
We add all the numbers together, and all the variables
-7u+17.5=0
We move all terms containing u to the left, all other terms to the right
-7u=-17.5
u=-17.5/-7
u=2+2.3333333333333/4.6666666666667
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