x,y的方程组2x-y=4m+3和2y-x=m-4的解满足x+y=3,求m的? 某商场按定价销售某种商品时,每件可获利25元,按定价的七五折销售该商品8件与将定价降低15元销售该商品12件所获利润相等,那么该商品的进价
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![x,y的方程组2x-y=4m+3和2y-x=m-4的解满足x+y=3,求m的? 某商场按定价销售某种商品时,每件可获利25元,按定价的七五折销售该商品8件与将定价降低15元销售该商品12件所获利润相等,那么该商品的进价](/uploads/image/z/318903-15-3.jpg?t=x%2Cy%E7%9A%84%E6%96%B9%E7%A8%8B%E7%BB%842x-y%3D4m%2B3%E5%92%8C2y-x%3Dm-4%E7%9A%84%E8%A7%A3%E6%BB%A1%E8%B6%B3x%2By%3D3%2C%E6%B1%82m%E7%9A%84%3F++%E6%9F%90%E5%95%86%E5%9C%BA%E6%8C%89%E5%AE%9A%E4%BB%B7%E9%94%80%E5%94%AE%E6%9F%90%E7%A7%8D%E5%95%86%E5%93%81%E6%97%B6%2C%E6%AF%8F%E4%BB%B6%E5%8F%AF%E8%8E%B7%E5%88%A925%E5%85%83%2C%E6%8C%89%E5%AE%9A%E4%BB%B7%E7%9A%84%E4%B8%83%E4%BA%94%E6%8A%98%E9%94%80%E5%94%AE%E8%AF%A5%E5%95%86%E5%93%818%E4%BB%B6%E4%B8%8E%E5%B0%86%E5%AE%9A%E4%BB%B7%E9%99%8D%E4%BD%8E15%E5%85%83%E9%94%80%E5%94%AE%E8%AF%A5%E5%95%86%E5%93%8112%E4%BB%B6%E6%89%80%E8%8E%B7%E5%88%A9%E6%B6%A6%E7%9B%B8%E7%AD%89%2C%E9%82%A3%E4%B9%88%E8%AF%A5%E5%95%86%E5%93%81%E7%9A%84%E8%BF%9B%E4%BB%B7)
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