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7x+3=24
7x=21
x=3
24 = 2x + (2x+2) + (3x+1)
24 = 2x + 2x + 2 + 3x + 1
24 = 7x + 3
21 = 7x
3 cm = x
a = 2x = 2 x 3 = 6 cm
b = 2x + 2 = 2x3 + 2 = 8 cm
c = 3x +1 = 3x3 + 1 = 10 cm
Maka sisi terpendek = a.2x dan sisi terpanjang = c.3x + 1