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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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