把六个苹果给现在的梨子,相当于原来的苹果对比原来的梨子+12, 这多余的12个相当于少了的两倍,所以原来的梨子是六个,苹果是三十个。
把六个苹果给现在的梨子,相当于原来的苹果对比原来的梨子+12, 这多余的12个相当于少了的两倍,所以原来的梨子是六个,苹果是三十个。
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