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-8.2+6u=1.4
We move all terms to the left:
-8.2+6u-(1.4)=0
We add all the numbers together, and all the variables
6u-9.6=0
We move all terms containing u to the left, all other terms to the right
6u=9.6
u=9.6/6
u=1+1/1.6666666666667
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