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3b+2p=23.000.|×2|
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6b+12p=54.000
6b+4p=46.000 -
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8p=8.000
p=8.000:8=1.000
3b+2p
3b+2×1000=23.000
3b=23.000-2.000
3b=21.000
b=21.000:3=7.000
1 pensil=1.000
1 buku=7.000
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