Question

The cost of a note book is twice the cost of a pen. Write a linear equation in two variables to represent this statement. ​

Answer 1

$\huge{\mathcal{\red{A}\green{N}\pink{S}\orange{W}\blue{E}\pink{R\: :-}}}$

ʟᴇᴛ’s ᴛᴀᴋᴇ ᴛʜᴇ ᴄᴏsᴛ ᴏғ ᴀ ɴᴏᴛᴇʙᴏᴏᴋ ᴀs ʀs. x ᴀɴᴅ ᴛʜᴇ ᴄᴏsᴛ ᴏғ ᴀ ᴘᴇɴ ᴀs ʀs. ʏ.

ɢɪᴠᴇɴ ᴛʜᴀᴛ ᴄᴏsᴛ ᴏғ ᴀ ɴᴏᴛᴇʙᴏᴏᴋ (x) ɪs ᴛᴡɪᴄᴇ ᴛʜᴇ ᴄᴏsᴛ ᴏғ ᴀ ᴘᴇɴ(ʏ).

sᴏ, x = 2ʏ.

x – 2ʏ = 0

x – 2ʏ = 0 ɪs ᴛʜᴇ ʟɪɴᴇᴀʀ ᴇǫᴜᴀᴛɪᴏɴ ɪɴ ᴛᴡᴏ ᴠᴀʀɪᴀʙʟᴇs ᴛʜᴀᴛ ʀᴇᴘʀᴇsᴇɴᴛ ᴛʜᴇ sᴛᴀᴛᴇᴍᴇɴᴛ.

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