题量有点多不好意思!1.若“△”是新规定的某种运算符号,且有A△B=5A+A*B.试求2△X=28中X的值.底下的都要方程解!2.已知{12(除以)(□-6)*(三又三分之一)-9}+1900=1981,求□=?3.一对少先队员乘
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![题量有点多不好意思!1.若“△”是新规定的某种运算符号,且有A△B=5A+A*B.试求2△X=28中X的值.底下的都要方程解!2.已知{12(除以)(□-6)*(三又三分之一)-9}+1900=1981,求□=?3.一对少先队员乘](/uploads/image/z/8943025-49-5.jpg?t=%E9%A2%98%E9%87%8F%E6%9C%89%E7%82%B9%E5%A4%9A%E4%B8%8D%E5%A5%BD%E6%84%8F%E6%80%9D%211.%E8%8B%A5%E2%80%9C%E2%96%B3%E2%80%9D%E6%98%AF%E6%96%B0%E8%A7%84%E5%AE%9A%E7%9A%84%E6%9F%90%E7%A7%8D%E8%BF%90%E7%AE%97%E7%AC%A6%E5%8F%B7%2C%E4%B8%94%E6%9C%89A%E2%96%B3B%3D5A%2BA%2AB.%E8%AF%95%E6%B1%822%E2%96%B3X%3D28%E4%B8%ADX%E7%9A%84%E5%80%BC.%E5%BA%95%E4%B8%8B%E7%9A%84%E9%83%BD%E8%A6%81%E6%96%B9%E7%A8%8B%E8%A7%A3%212.%E5%B7%B2%E7%9F%A5%7B12%EF%BC%88%E9%99%A4%E4%BB%A5%EF%BC%89%EF%BC%88%E2%96%A1-6%EF%BC%89%2A%EF%BC%88%E4%B8%89%E5%8F%88%E4%B8%89%E5%88%86%E4%B9%8B%E4%B8%80%EF%BC%89-9%7D%2B1900%3D1981%2C%E6%B1%82%E2%96%A1%3D%3F3.%E4%B8%80%E5%AF%B9%E5%B0%91%E5%85%88%E9%98%9F%E5%91%98%E4%B9%98)
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