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11u+11.38=10.1u-5.81
We move all terms to the left:
11u+11.38-(10.1u-5.81)=0
We get rid of parentheses
11u-10.1u+5.81+11.38=0
We add all the numbers together, and all the variables
0.9u+17.19=0
We move all terms containing u to the left, all other terms to the right
0.9u=-17.19
u=-17.19/0.9
u=-19+0.09/0.9
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