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4s = 2(p+l)
4(x+3) = 2(2x-3 + x+1)
4x+12 = 2(3x-2)
4x+12 = 6x-4
16 = 2x
X = 8cm
Sisi persegi = x + 3
Sisi persegi = 8 + 3 = 11cm... jadikan jawaban terbaik ya