人教,下册已知方程组x+y=-7-m,x-y=1+3m的解满足x为非正数,y为负数.(1)求m的取值范围;(2)化简│m-3│-│m+2│;(3)在m的取值范围内,当m为何整数时,不等式2mx+x<2m+1的解为x>1.(麻烦尽量用∵,∴概
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![人教,下册已知方程组x+y=-7-m,x-y=1+3m的解满足x为非正数,y为负数.(1)求m的取值范围;(2)化简│m-3│-│m+2│;(3)在m的取值范围内,当m为何整数时,不等式2mx+x<2m+1的解为x>1.(麻烦尽量用∵,∴概](/uploads/image/z/7073021-29-1.jpg?t=%E4%BA%BA%E6%95%99%2C%E4%B8%8B%E5%86%8C%E5%B7%B2%E7%9F%A5%E6%96%B9%E7%A8%8B%E7%BB%84x%2By%3D-7-m%2Cx-y%3D1%2B3m%E7%9A%84%E8%A7%A3%E6%BB%A1%E8%B6%B3x%E4%B8%BA%E9%9D%9E%E6%AD%A3%E6%95%B0%2Cy%E4%B8%BA%E8%B4%9F%E6%95%B0.%281%29%E6%B1%82m%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%EF%BC%9B%282%29%E5%8C%96%E7%AE%80%E2%94%82m-3%E2%94%82-%E2%94%82m%2B2%E2%94%82%EF%BC%9B%283%29%E5%9C%A8m%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E5%86%85%2C%E5%BD%93m%E4%B8%BA%E4%BD%95%E6%95%B4%E6%95%B0%E6%97%B6%2C%E4%B8%8D%E7%AD%89%E5%BC%8F2mx%2Bx%EF%BC%9C2m%2B1%E7%9A%84%E8%A7%A3%E4%B8%BAx%EF%BC%9E1.%EF%BC%88%E9%BA%BB%E7%83%A6%E5%B0%BD%E9%87%8F%E7%94%A8%E2%88%B5%2C%E2%88%B4%E6%A6%82)
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