Question

5 pencils and 7 pens together cost Rupees 50 where as 7 pencil and 5 pens together cost 46 find the cost of one pencil and that of one pen​

Answer 1

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Answer 2

ʜᴇʏᴀ ᴍᴀᴛᴇ!!

ʜᴇʀᴇ ɪs ᴜʀ ᴀɴsᴡᴇʀ ⏬ ⏬

ʟᴇᴛ ᴘᴇɴᴄɪʟ ʙᴇ x ᴀɴᴅ ʟᴇᴛ ᴘᴇɴ ʙᴇ ʏ

5x+7ʏ=50

7x+5ʏ=46

ᴍᴜʟᴛɪᴘʟʏ ғɪʀsᴛ ᴇϙᴜᴀᴛɪᴏɴ ʙʏ 7

35x+49ʏ = 350

ᴍᴜʟᴛɪᴘʟʏ sᴇᴄᴏɴᴅ ᴇϙᴜᴀᴛɪᴏɴ ʙʏ 5

35x+25ʏ=230

sᴏʟᴠɪɴɢ ᴛʜᴇᴍ ᴡᴇ ɢᴇᴛ 24ʏ=120 ᴡʜɪᴄʜ ɢɪᴠᴇs ʏ ɪs 5 ʀᴜᴘᴇᴇs

sᴜʙsᴛɪᴛᴜᴛɪɴɢ ɪɴ sᴇᴄᴏɴᴅ ᴇϙᴜᴀᴛɪᴏɴ ᴡᴇ ɢᴇᴛ x ɪs 3 ʀᴜᴘᴇᴇs