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60 = 2(4x+1+2x+5)
60 = 2(6x +6)
60 = 12x + 12
12x = 60-12
12x = 48
x = 48/12
x = 4
panjang = 4x + 1 =( 4 x 4) + 1 = 16 + 1 = 17 cm
lebar = 2x + 5 = (2 x 4) + 5 = 8 + 5 = 13 cm