Persegi panjang
[tex]2(p + l) = K eliling \\ 2(6x - 2 + 3x - 1) = 69 \\ 9x - 3= 34,5\\ 9x = 34,5 + 3\\ x = \frac{37,5}{9} = \frac{12,5}{3} \\ \\ panjang = 6x - 2 \\ 6( \frac{12.5}{3} ) - 2= 23 \: cm \\ \\ lebar = 3x - 1 \\ 3( \frac{12,5}{3} ) - 1 = 11,5 \: cm[/tex]
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Persegi panjang
[tex]2(p + l) = K eliling \\ 2(6x - 2 + 3x - 1) = 69 \\ 9x - 3= 34,5\\ 9x = 34,5 + 3\\ x = \frac{37,5}{9} = \frac{12,5}{3} \\ \\ panjang = 6x - 2 \\ 6( \frac{12.5}{3} ) - 2= 23 \: cm \\ \\ lebar = 3x - 1 \\ 3( \frac{12,5}{3} ) - 1 = 11,5 \: cm[/tex]