请帮忙做几道数学问题,最好有具体解法和答案,谢谢了,急啊!题目如下:(注意:/某数/意思为某数的绝对值,因为我不会打绝对值的符号)1.如果2/y-3/+3(2x-4)的平方=0,那么2x-y的值是_______.2.已知-m+2n=5,
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![请帮忙做几道数学问题,最好有具体解法和答案,谢谢了,急啊!题目如下:(注意:/某数/意思为某数的绝对值,因为我不会打绝对值的符号)1.如果2/y-3/+3(2x-4)的平方=0,那么2x-y的值是_______.2.已知-m+2n=5,](/uploads/image/z/12598208-8-8.jpg?t=%E8%AF%B7%E5%B8%AE%E5%BF%99%E5%81%9A%E5%87%A0%E9%81%93%E6%95%B0%E5%AD%A6%E9%97%AE%E9%A2%98%2C%E6%9C%80%E5%A5%BD%E6%9C%89%E5%85%B7%E4%BD%93%E8%A7%A3%E6%B3%95%E5%92%8C%E7%AD%94%E6%A1%88%2C%E8%B0%A2%E8%B0%A2%E4%BA%86%2C%E6%80%A5%E5%95%8A%21%E9%A2%98%E7%9B%AE%E5%A6%82%E4%B8%8B%3A%28%E6%B3%A8%E6%84%8F%3A%2F%E6%9F%90%E6%95%B0%2F%E6%84%8F%E6%80%9D%E4%B8%BA%E6%9F%90%E6%95%B0%E7%9A%84%E7%BB%9D%E5%AF%B9%E5%80%BC%2C%E5%9B%A0%E4%B8%BA%E6%88%91%E4%B8%8D%E4%BC%9A%E6%89%93%E7%BB%9D%E5%AF%B9%E5%80%BC%E7%9A%84%E7%AC%A6%E5%8F%B7%291.%E5%A6%82%E6%9E%9C2%2Fy-3%2F%2B3%282x-4%29%E7%9A%84%E5%B9%B3%E6%96%B9%3D0%2C%E9%82%A3%E4%B9%882x-y%E7%9A%84%E5%80%BC%E6%98%AF_______.2.%E5%B7%B2%E7%9F%A5-m%2B2n%3D5%2C)
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