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8u=2u+20
We move all terms to the left:
8u-(2u+20)=0
We get rid of parentheses
8u-2u-20=0
We add all the numbers together, and all the variables
6u-20=0
We move all terms containing u to the left, all other terms to the right
6u=20
u=20/6
u=3+1/3
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