A sum of Rs 500 is in the form of notes of donations of Rs 5 and Rs 10.if total no of notes is Rs 90 ,find the number of notes of each type
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5x+10y=500.........(1)
x+y=90..................(2)
5x+10y=500.........(3)
5x+5y=450.........(4)
5y=50...............y=10
x=80
x+y=90..................(2)
5x+10y=500.........(3)
5x+5y=450.........(4)
5y=50...............y=10
x=80
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