2x = 2 x 3 = 6 cm 2x + 2 = (2 x 3) + 2 = 6 + 2 = 8 cm 3x + 1 = (3 x 3) + 1 = 9 + 1 = 10 cm (terpanjang)
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donamonicantik
Karena keliling merupakan jumlah dari semua sisinya, maka keliling = jumlah sisi 24 = 2x + (2x+2) + (3x+1) 24 = 7x + 3 7x = 21 x = 3 substitusikan x ke 2x = 2(3) = 6 2x+2 = 2(3)+2 = 6+2 = 8 3x+1 = 3(3)+1 = 10 jadi panjang sisi terpanjang adalah 10cm
24 = 7x + 3
24-3 = 7x + 3 - 3
21 = 7x
x = 21/7
x = 3
2x = 2 x 3 = 6 cm
2x + 2 = (2 x 3) + 2 = 6 + 2 = 8 cm
3x + 1 = (3 x 3) + 1 = 9 + 1 = 10 cm (terpanjang)
keliling = jumlah sisi
24 = 2x + (2x+2) + (3x+1)
24 = 7x + 3
7x = 21
x = 3
substitusikan x ke
2x = 2(3) = 6
2x+2 = 2(3)+2 = 6+2 = 8
3x+1 = 3(3)+1 = 10
jadi panjang sisi terpanjang adalah 10cm