A lady has some 50 paise coins and some 25 paise coins in her purse if in all she 55 coins totalling Rs. 21.25 how many 50 paise coins she was?please explain each & every step
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Let x no of 50paise coin and y no of 25 paise coins she have
x+y=55---------------(1)
A. To. Q
Total money she has in paise =21.25x100
50x+25y=2125
25(2x+y)=2125
2x+y=85----------------(2)
Eq(1)-eq(2)
x+y-2x-y=55-85
-x=-30
x=30coins
Put x in eq(1)
30+y=55
y=25coins
x+y=55---------------(1)
A. To. Q
Total money she has in paise =21.25x100
50x+25y=2125
25(2x+y)=2125
2x+y=85----------------(2)
Eq(1)-eq(2)
x+y-2x-y=55-85
-x=-30
x=30coins
Put x in eq(1)
30+y=55
y=25coins
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