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5.1=-2u+17.9
We move all terms to the left:
5.1-(-2u+17.9)=0
We get rid of parentheses
2u-17.9+5.1=0
We add all the numbers together, and all the variables
2u-12.8=0
We move all terms containing u to the left, all other terms to the right
2u=12.8
u=12.8/2
u=6+0.8/2
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