A man has only 20 paise and 25 paise coin in his purse 50 coin in all totally rs 11.25 write there linear equation from the in for motion and draw their graph
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no. of 20p coins=x
no. of 25p coins=y
x+y=50
x=50-y...........1
20x+25y=1125
4x+5y=225........2
4(50-y) +5y=225
200-4y+5y=225
y=25
4x=100
x=25
no. of 25p coins=y
x+y=50
x=50-y...........1
20x+25y=1125
4x+5y=225........2
4(50-y) +5y=225
200-4y+5y=225
y=25
4x=100
x=25
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