Keliling persegi panjang = 2(p+l)
[tex]72 = 2(5x - 1 + 2x + 2) \\ 36 = 7x + 1 \\ 36 - 1 = 7x \\ 35 = 7x \\ \frac{35}{7} = x \\ x = 5 \\ \\ panjang \\ 5x - 1 \\ 5(5) - 1 \\ 25 - 1 \\ 24 \: cm\\ \\ lebar \\ 2x + 2 \\ 2(5) + 2 \\ 10 + 2 \\ 12 \: cm[/tex]
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Keliling persegi panjang = 2(p+l)
[tex]72 = 2(5x - 1 + 2x + 2) \\ 36 = 7x + 1 \\ 36 - 1 = 7x \\ 35 = 7x \\ \frac{35}{7} = x \\ x = 5 \\ \\ panjang \\ 5x - 1 \\ 5(5) - 1 \\ 25 - 1 \\ 24 \: cm\\ \\ lebar \\ 2x + 2 \\ 2(5) + 2 \\ 10 + 2 \\ 12 \: cm[/tex]