A sum of rs 500 is in the form of denominator of rs 5 and rs 10 .If the total number of notes is 90 find the number of notes of eqch type
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let the number of 10 rupees notes be y and 5 rupees be x
given in qstn 5x+10y=500........(1)
and also x+y=90........(2)
multiply eqn 2 with 5 (to eliminate one of the term)
then we have 5x+10y=500 ...(1)
5x+5y=450
by subtracting we get
5y=50
=>y=10 and substituting y in eqn one or two we get x=80
then therefore number of 5 rupees notes are 80 and ten rupees notes are 10
given in qstn 5x+10y=500........(1)
and also x+y=90........(2)
multiply eqn 2 with 5 (to eliminate one of the term)
then we have 5x+10y=500 ...(1)
5x+5y=450
by subtracting we get
5y=50
=>y=10 and substituting y in eqn one or two we get x=80
then therefore number of 5 rupees notes are 80 and ten rupees notes are 10
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