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-27.8=u/2-2.2
We move all terms to the left:
-27.8-(u/2-2.2)=0
We get rid of parentheses
-u/2+2.2-27.8=0
We multiply all the terms by the denominator
-u+(2.2)*2-(27.8)*2=0
We add all the numbers together, and all the variables
-1u-51.2=0
We move all terms containing u to the left, all other terms to the right
-u=51.2
u=51.2/-1
u=-51+0.2/1
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