花了3.12元.李王阿姨和李阿姨去农贸市场卖黄瓜,每千克黄瓜2.4元,王阿姨买了...
李阿姨买了x2.4x-1.5x2.4=3.122.4x-3.6=3.122.4x=3.6 3.122.4x=6.72x=2.8答:买了2.8kg
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李阿姨买了x2.4x-1.5x2.4=3.122.4x-3.6=3.122.4x=3.6 3.122.4x=6.72x=2.8答:买了2.8kg