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-4.4=u/7+13.1
We move all terms to the left:
-4.4-(u/7+13.1)=0
We get rid of parentheses
-u/7-13.1-4.4=0
We multiply all the terms by the denominator
-u-(13.1)*7-(4.4)*7=0
We add all the numbers together, and all the variables
-1u-122.5=0
We move all terms containing u to the left, all other terms to the right
-u=122.5
u=122.5/-1
u=-122+0.5/1
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