Question

6 pencils and 4 erasers cost rupees 42 while 2 pencils and 6 erasers cost rs.21. find the prize of a pencil and an eraser​

Answer 1

Step-by-step explanation:

let the pencil be x and erasers be y

6x+4y=42 ______(I)

2x+6y=21_______(ii)

on solving by elimination method.

6x+4y=42{multiply by 6}

2x+6y=21{multiply by 4}

36x+24y=252.

8x - 24y=84

【+24y and -24y got cancelled】

36x+8x=252+84

44x=336

x=336/44______(iii)

2x+6y=42

2×336/44+6y=42

336/22+6y=42

336+2016y=924

2016y=924-336

2016y=588

y=588/2016

y=0.29

Hope it helps

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Answer 2

Answer:

for the new period

Step-by-step explanation: