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= 2 [(4x + 3) + (2x - 2)]
= 2.(4x + 3 + 2x - 2)
= 2.(6x + 1)
= 12x + 2
b) keliling = 12x + 2
62 = 12x + 2
12x = 62 - 2
12x = 60
x = 60 : 12
x = 5
c) panjang = 4x + 3
= 4.(5) + 3
= 20 + 3
= 23 cm
lebar = 2x - 2
= 2 .(5) - 2
= 10 - 2
= 8 cm