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-2.5+u/6=-21.7
We move all terms to the left:
-2.5+u/6-(-21.7)=0
We add all the numbers together, and all the variables
u/6+19.2=0
We multiply all the terms by the denominator
u+(19.2)*6=0
We add all the numbers together, and all the variables
u+115.2=0
We move all terms containing u to the left, all other terms to the right
u=-115.2
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