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Verified answer
Panjang=plebar=l=p-3
keliling=K=34 m
Rumus keliling persegi panjang
2p+2l=K
2p+2(p-3)=34
2p+2p-6=34
4p=34+6
4p=40
p=10 m
l=p-3
l=10-3
l=7 m
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