3(m+n)+1+3(m+n)+2
=3m+3n+1+3m+3n+3
=6m+6n+3
=3(2m+2n+1)
2m+2n+1ใฏๆดๆฐใ ใใ3(2m+2n+1)ใฏ3ใฎๅๆฐใงใใ
ใใใงใใกใงใใ๏ผ
่ณๆฅ๐๐ปโโ๏ธ๐๐ปโโ๏ธ
ใใฎๅ้กใฎ่ชฌๆ้จๅใฎ
็ญใๆนใๆใใฆใใ ใใ๏ฝฏ๐๐ปโโ๏ธ๐ฆ
ใงใใใ ใ่ฉณใใๆธใใฆ้ ใใใจๅฌใใใงใ๏ฝฏ๐ฅบ๐
3(m+n)+1+3(m+n)+2
=3m+3n+1+3m+3n+3
=6m+6n+3
=3(2m+2n+1)
2m+2n+1ใฏๆดๆฐใ ใใ3(2m+2n+1)ใฏ3ใฎๅๆฐใงใใ
ใใใงใใกใงใใ๏ผ
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