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-28=-4/3u
We move all terms to the left:
-28-(-4/3u)=0
Domain of the equation: 3u)!=0We get rid of parentheses
u!=0/1
u!=0
u∈R
4/3u-28=0
We multiply all the terms by the denominator
-28*3u+4=0
Wy multiply elements
-84u+4=0
We move all terms containing u to the left, all other terms to the right
-84u=-4
u=-4/-84
u=1/21
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