Jawab:
[tex]22\frac{4}{7}[/tex]
Penjelasan dengan langkah-langkah:
Halo kak, saya akan coba bantu jawab pertanyaan kakak
Rumus Keliling Persegi Panjang = 2(p+l)
68 = 2(p+l)
68/2 = p + l
34 = (5x-1) + (2x+2)
34 = 7x + 1
34-1 = 7x
33 = 7x
x = 33/7
Panjang = 5(33/7) -1
Panjang = [tex]22\frac{4}{7}[/tex]
22,57 cm
Penjelasan dengan langkah-langkah:
Mencari nilai x
Keliling = 2 × (p + l)
68 = 2 × ( (5x -1) + (2x + 2) )
68 = 2 × (7x + 1)
68 = (2 × 7x) + (2 × 1)
68 = 14x + 2
14x = 68 - 2
14x = 66
x = [tex] \frac{66}{14} [/tex]
x = [tex] \frac{33}{7} = = > \red{ \sf \: disederhanakan}[/tex]
=========================
Mencari panjang
Panjang = (5x - 1)
Panjang = [tex](5( \frac{33}{7} ) \times - 1)[/tex]
Panjang = [tex] \frac{165}{7} - 1[/tex]
Panjang = [tex] \red{22.57}[/tex]
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