a sum of rupees 800 in the form of denomination of rupees 10 and 20 the total number of notes is 50 find the number of notes of each type
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shreyaagarwal6408:
it's very easy thank you for this
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let x be 10Rs
y be 20Rs
x + y = 50....................I
10x + 20y = 800........II
multiply equation I by 10
10x + 10y = 500.........III
subtraction of equation II AND III
ANSWER = 30
y be 20Rs
x + y = 50....................I
10x + 20y = 800........II
multiply equation I by 10
10x + 10y = 500.........III
subtraction of equation II AND III
ANSWER = 30
it's very hard formula
then what
its the best one bro
but I am in class 7 so it is very hard for me
ok
tomorrow ill give you an easy one
thanks
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