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72 = 2 (5x-1+2x+2)
36 = 7x+1
35 = 7x
x = 5
Panjang = 24, lebar = 12
10x-2 + 4x+4 = 72
14x + 2 = 72
14x = 70
x = 5
5x5-1 =24
2x5+2 = 12