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正方形=24三角形=12☆=41圓=10列出四個方程:三角形=圓+2(1)正方形=三角形+三角形(2)☆=三角形+正方形+5(3)☆=圓+31(4)由(3)(4)得:圓+31=三角形+正方形+5把(1)帶入上式:正方形=2…
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