sum of rupee 800 is in the form of denominations of rupees 10 and 20 if the total number of note is 50 find the number of notes of each type
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Let the 10 rupee note be x
then , 20 rupee note be 20(50-x) .
Total money= 10×x+20(50-x)= 10x+ 1000-20x
10x + 1000-20x= 800
-20x+10x +1000=800
-10x +1000= 800
-10x= 800-1000
-10x= -200
x= -200/-10
x = 20
then , 20 rupee note be 20(50-x) .
Total money= 10×x+20(50-x)= 10x+ 1000-20x
10x + 1000-20x= 800
-20x+10x +1000=800
-10x +1000= 800
-10x= 800-1000
-10x= -200
x= -200/-10
x = 20
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