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-1/3u=19
We move all terms to the left:
-1/3u-(19)=0
Domain of the equation: 3u!=0We multiply all the terms by the denominator
u!=0/3
u!=0
u∈R
-19*3u-1=0
Wy multiply elements
-57u-1=0
We move all terms containing u to the left, all other terms to the right
-57u=1
u=1/-57
u=-1/57
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