Question

$\sf \rm \large \color{plum} \colorbox{black}{ {❥︎ TIOn}}$
in an envelope there are some five rupee notes and some 10 rupee note total amount of this note together is 350 rupees number of five rupee notes are less b n numbers of 10 rupee notes then find the number of 5 and 10 rupee note


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Answer 1

Let the number of 5 rupee note be x and the number of 10 rupee note be y

Then according to the question ,

5x+10y=350 1

Also,x=2y−10 2

Putting the value of x from eq .2 in eq. 1 we get,

5(2y−10)+10y=350

20y=400

y=20

Putting the value of y in eq.2 we get x=30

Hence, the number oof 5 and 10 rupee note are30 and 20 respectively.

Answer 2

$\sf \rm{Let \: the \: number \: of \: 5 \: rupee \: note \: be  \: x \:  and \: the \: number \: of \: 10 \: rupee \: note \: be \:  y}$

$\sf \rm {\boxed{ \color{blue}{Then \: according \: to \: the \: question ,}}}$

$\sf \rm{5x+10y=350 \: \: \: \: \: \: \: \: \: \: \: (i)}$

$\sf \rm{Also, \: x=2y−10    \: \: \: \: \: \: \: \: \: \: \: \: (ii)}$

$\sf \fbox{Putting \: the \: value \: of \: x \: from \: eq .2 \: in eq. 1 \: we get,}$

$\sf{5(2y - 10) + 10y = 350}$

20y=400

y = 20

Putting the value of y in eq.2 we get x=30

Hence, the number oof 5 and 10 rupee note are30 and 20 respectively.

hope its help u

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