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= 2x + 2x + 2 + 3x + 1
= 2x + 2x + 3x + 2 + 1
= 7x + 3
7x + 3 = 24
7x = 24 - 3
7x = 21
x = 21/7
x = 3
sisi-sisinya :
2x = 2(3) = 6 cm
2x + 2 = 2(3) + 2 = 6 + 2 = 8 cm
3x + 1 = 3(3) + 1 = 9 + 1 = 10 cm
jadi sisi yang terpanjang = 10 cm
7x + 3 = 24
7x = 24 - 3
7x = 21
x = 3 cm
sisi I. 2x = 2 x 3 = 6 cm
sisi II. 2x + 2 = 2 x 3 + 2 = 8 cm
sisi III. 3x + 1 = 3 x 3 + 1 = 10 cm
jadi sisi yang terpanjang adalah sisi III atau (3x + 1)