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-1/4a=15
We move all terms to the left:
-1/4a-(15)=0
Domain of the equation: 4a!=0We multiply all the terms by the denominator
a!=0/4
a!=0
a∈R
-15*4a-1=0
Wy multiply elements
-60a-1=0
We move all terms containing a to the left, all other terms to the right
-60a=1
a=1/-60
a=-1/60
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