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-3/8u=9
We move all terms to the left:
-3/8u-(9)=0
Domain of the equation: 8u!=0We multiply all the terms by the denominator
u!=0/8
u!=0
u∈R
-9*8u-3=0
Wy multiply elements
-72u-3=0
We move all terms containing u to the left, all other terms to the right
-72u=3
u=3/-72
u=-1/24
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