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-4/5u=12
We move all terms to the left:
-4/5u-(12)=0
Domain of the equation: 5u!=0We multiply all the terms by the denominator
u!=0/5
u!=0
u∈R
-12*5u-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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