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設三角形是x,正方形是y,圓形是z,則有1)x-y=2.8 2)y+z=9.2 3)x+z=3x 根據3)得4)z=2x 由4)得5)y=9.2-z=9.2-2x 由5)得6)x=2.8+y=2.8+9.2-2x既3x=12 x=4 囙此得出x=4 y=1.2 z=8
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