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chapter 3
ex- 3.3
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Answers
2x + 3ʏ = 11 .......(ɪ)
2x - 4ʏ = -24......(ɪɪ)
sᴏʟᴠɪɴɢ ᴛʜᴇsᴇ ᴇϙᴜᴀᴛɪᴏɴs ʙʏ sᴜʙsᴛɪᴛᴜᴛɪᴏɴ ᴍᴇᴛʜᴏᴅ,
ɴᴏᴡ, ғʀᴏᴍ (ɪɪ), ᴡᴇ ɢᴇᴛ,
2x-4ʏ=-24
2x=-24+4ʏ
x=(-24+4ʏ)/2
x=-24/2+4ʏ/2
x=-12+2ʏ...........(ɪɪɪ)
ᴘᴜᴛ ᴛʜɪs ᴠᴀʟᴜᴇ ᴏғ x ɪɴ (ɪ), ᴡᴇ ɢᴇᴛ,
2(-12+2ʏ) + 3ʏ = 11
-24+4ʏ+3ʏ=11
7ʏ=11+24
7ʏ=35
ʏ=35/7
ʏ=5
ɴᴏᴡ ᴘᴜᴛ ᴛʜɪs ᴠᴀʟᴜᴇ ᴏғ ʏ ɪɴ (ɪɪɪ)
=-12+2ʏ
=-12+2(5)
=-12+10
=-2
ʏ=ᴍx+3 {ʏ=5,x=-2)
5=ᴍ(-2)+3
5=-2ᴍ+3
5-3=-2ᴍ
2=-2ᴍ
2/2=-ᴍ
1=-ᴍ
-1=ᴍ
ʏᴏᴜʀ ᴀɴsᴡᴇʀ ɪs ʜᴇʀᴇ
ʜᴏᴘᴇ ɪᴛ ɪs ʜᴇʟᴘғᴜʟ
ᴛʜᴀɴᴋ ʏᴏᴜ
ᴀɴsᴡᴇʀ :-
2x + 3ʏ = 11 .......(ɪ)
2x - 4ʏ = -24......(ɪɪ)
sᴏʟᴠɪɴɢ ᴛʜᴇsᴇ ᴇϙᴜᴀᴛɪᴏɴs ʙʏ sᴜʙsᴛɪᴛᴜᴛɪᴏɴ ᴍᴇᴛʜᴏᴅ,
ɴᴏᴡ, ғʀᴏᴍ (ɪɪ), ᴡᴇ ɢᴇᴛ,
2x-4ʏ=-24
2x=-24+4ʏ
x=(-24+4ʏ)/2
x=-24/2+4ʏ/2
x=-12+2ʏ...........(ɪɪɪ)
ᴘᴜᴛ ᴛʜɪs ᴠᴀʟᴜᴇ ᴏғ x ɪɴ (ɪ), ᴡᴇ ɢᴇᴛ,
2(-12+2ʏ) + 3ʏ = 11
-24+4ʏ+3ʏ=11
7ʏ=11+24
7ʏ=35
ʏ=35/7
ʏ=5
ɴᴏᴡ ᴘᴜᴛ ᴛʜɪs ᴠᴀʟᴜᴇ ᴏғ ʏ ɪɴ (ɪɪɪ)
=-12+2ʏ
=-12+2(5)
=-12+10
=-2
ʏ=ᴍx+3 {ʏ=5,x=-2)
5=ᴍ(-2)+3
5=-2ᴍ+3
5-3=-2ᴍ
2=-2ᴍ
2/2=-ᴍ
1=-ᴍ
-1=ᴍ
ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs
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