Mohon caranya dang pengerjaan nya

4). a). Jumlah ketiga sisi = Keliling

3x + (2x + 1) + (5x – 5) = 36

3x + 2x + 1 + 5x – 5 = 36

3x + 2x + 5x + 1 – 5 = 36

10x – 4 = 36

10x = 36 + 4

10x = 40

x = 40/10

x = 4

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b). 3x = 3(4) = 12 cm

2x + 1 = 2(4) + 1 = 8 + 1 = 9 cm

5x – 5 = 5(4) – 5 = 20 – 5 = 15 cm

Panjang sisi terpendek adalah 9 cm

semoga bermanfaat……………