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48 = 3x+4x+5x
48= 12x
x= 48/12
x= 4
ab= 4x
= 4 (4)
= 16
maka, pnjang ab adalah 16 cm
48 = 4x + 5x + 3x
48 = 12x
x = 48:12
x = 4
panjang ab = 4x = 4(4) = 8 cm