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4.2=10.6-2u
We move all terms to the left:
4.2-(10.6-2u)=0
We add all the numbers together, and all the variables
-(-2u+10.6)+4.2=0
We get rid of parentheses
2u-10.6+4.2=0
We add all the numbers together, and all the variables
2u-6.4=0
We move all terms containing u to the left, all other terms to the right
2u=6.4
u=6.4/2
u=3+0.4/2
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