填空题 ①当x=___时,分式x-x-2÷2x+x+1的值为0.②原售价为2000元的商品,经过两次降价后(每次降价的百分率都相同)现售价为720元,则每次降价的百分率为___.③等腰三角形中有一个角是52°,它一条腰
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![填空题 ①当x=___时,分式x-x-2÷2x+x+1的值为0.②原售价为2000元的商品,经过两次降价后(每次降价的百分率都相同)现售价为720元,则每次降价的百分率为___.③等腰三角形中有一个角是52°,它一条腰](/uploads/image/z/641962-10-2.jpg?t=%E5%A1%AB%E7%A9%BA%E9%A2%98+%E2%91%A0%E5%BD%93x%3D___%E6%97%B6%2C%E5%88%86%E5%BC%8Fx-x-2%C3%B72x%2Bx%2B1%E7%9A%84%E5%80%BC%E4%B8%BA0.%E2%91%A1%E5%8E%9F%E5%94%AE%E4%BB%B7%E4%B8%BA2000%E5%85%83%E7%9A%84%E5%95%86%E5%93%81%2C%E7%BB%8F%E8%BF%87%E4%B8%A4%E6%AC%A1%E9%99%8D%E4%BB%B7%E5%90%8E%28%E6%AF%8F%E6%AC%A1%E9%99%8D%E4%BB%B7%E7%9A%84%E7%99%BE%E5%88%86%E7%8E%87%E9%83%BD%E7%9B%B8%E5%90%8C%29%E7%8E%B0%E5%94%AE%E4%BB%B7%E4%B8%BA720%E5%85%83%2C%E5%88%99%E6%AF%8F%E6%AC%A1%E9%99%8D%E4%BB%B7%E7%9A%84%E7%99%BE%E5%88%86%E7%8E%87%E4%B8%BA___.%E2%91%A2%E7%AD%89%E8%85%B0%E4%B8%89%E8%A7%92%E5%BD%A2%E4%B8%AD%E6%9C%89%E4%B8%80%E4%B8%AA%E8%A7%92%E6%98%AF52%C2%B0%2C%E5%AE%83%E4%B8%80%E6%9D%A1%E8%85%B0)
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