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Hmm bhi yahi bolre the
Ma'am paas wale subject k according hv aati h
Isme her teachers h to ye singular kese hua, to fr is kese aayega
Divide by x² then you get
X²-79+1/x²=0
X²+1/x²=79
Add 2 both side
Then
(X+1/x)²=81
X+1/x=9 ans
Let M=4x
25% less means cp=3x
Cp for illahi=3x+1000
Usko 10% ka profit hua
It means
(3x+1000)×110/100=4x
33x+11000=40x
7x=11000
M=4x=11000×4/7
=6285.71
