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-28.1=-2.6+u/6
We move all terms to the left:
-28.1-(-2.6+u/6)=0
We add all the numbers together, and all the variables
-(u/6-2.6)-28.1=0
We get rid of parentheses
-u/6+2.6-28.1=0
We multiply all the terms by the denominator
-u+(2.6)*6-(28.1)*6=0
We add all the numbers together, and all the variables
-1u-153=0
We move all terms containing u to the left, all other terms to the right
-u=153
u=153/-1
u=-153
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