这个不等式[x+3]+[x-4]≤9怎么解啊?[ ]代表绝对值..
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![这个不等式[x+3]+[x-4]≤9怎么解啊?[ ]代表绝对值..](/uploads/image/z/14378857-25-7.jpg?t=%E8%BF%99%E4%B8%AA%E4%B8%8D%E7%AD%89%E5%BC%8F%5Bx%2B3%5D%2B%5Bx-4%5D%E2%89%A49%E6%80%8E%E4%B9%88%E8%A7%A3%E5%95%8A%3F%5B+%5D%E4%BB%A3%E8%A1%A8%E7%BB%9D%E5%AF%B9%E5%80%BC..)
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