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4/5=u+4
We move all terms to the left:
4/5-(u+4)=0
We get rid of parentheses
-u-4+4/5=0
We multiply all the terms by the denominator
-u*5+4-4*5=0
We add all the numbers together, and all the variables
-u*5-16=0
Wy multiply elements
-5u-16=0
We move all terms containing u to the left, all other terms to the right
-5u=16
u=16/-5
u=-3+1/5
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