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-3/8u=15
We move all terms to the left:
-3/8u-(15)=0
Domain of the equation: 8u!=0We multiply all the terms by the denominator
u!=0/8
u!=0
u∈R
-15*8u-3=0
Wy multiply elements
-120u-3=0
We move all terms containing u to the left, all other terms to the right
-120u=3
u=3/-120
u=-1/40
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