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20=-4/3u
We move all terms to the left:
20-(-4/3u)=0
Domain of the equation: 3u)!=0We get rid of parentheses
u!=0/1
u!=0
u∈R
4/3u+20=0
We multiply all the terms by the denominator
20*3u+4=0
Wy multiply elements
60u+4=0
We move all terms containing u to the left, all other terms to the right
60u=-4
u=-4/60
u=-1/15
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