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28=u/5-16
We move all terms to the left:
28-(u/5-16)=0
We get rid of parentheses
-u/5+16+28=0
We multiply all the terms by the denominator
-u+16*5+28*5=0
We add all the numbers together, and all the variables
-1u+220=0
We move all terms containing u to the left, all other terms to the right
-u=-220
u=-220/-1
u=+220
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