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1.07u-8u+0.34=2.1
We move all terms to the left:
1.07u-8u+0.34-(2.1)=0
We add all the numbers together, and all the variables
-6.93u-1.76=0
We move all terms containing u to the left, all other terms to the right
-6.93u=1.76
u=1.76/-6.93
u=-1/3.9375
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