Question

please help me to solve this question as soon as possible please guys ​

Answer 1

Let x and y be the ₹2&₹1 notes respectively.

therefore, x+y= 19(the sum of ₹2&₹1 notes)________(1)

also, 2x+1y= 26(the total number of rupees)_________(2)

now, subtracting (1) from (2):--

( x+y)-(2x+y)= 19-26.

x+y-2x-y= -7.

-x= -7.

x=7.

now, substitute this value of x in equation (1):--

x+y=19.

7+y=19.

y=19-7=12.

Thus, the ₹2&₹1 notes with her are 7 and 12 respectively.

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Answer 2

$let \: the \: no \: of \: rs \: 2 \: note \: be \: x \\ and \: no \: of \: rs \: 1 \: note \: be \: y \\ \\so \\ total \: rate \: of \: rs \: 2 \: note \: = \: 2 \times x \: = \: 2x \\ total \: rate \: of \: rs \: 1 \: note \: = \: 1 \times y \: = y \\ \\ x + y \: = \: 19 \: \: \: equation \: \: 1\\ 2x + y \: = \: 26 \: \: equation \: 2 \\ \\ subtracting \: equation \: 1 \: and \: 2 \\ \\ x + y = 19 \\ 2x + y \: = 26 \\ - - - - - - - - \\ - x \: = - 7 \\ x \: = \: 7 \\ substituting \: the \: value \: of \: x \: in \: equation \: 1 \\ x \: + \: y \: = \: 19 \\ 7 \: + \: y \: = \: 19 \\ y \: = \: 19 \: - \: 7 \\ y \: = \:12 \\ \\ x \: = \: 7 \: \: (ans) \\ y \: = \: 12 \: (ans)$

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