初一数学解方程问题:已知y1=2x+3,y2=1-1/2x已知y1=2x+3,y2=1-1/2x.当x取何值,y1-3y2=0当x取何值,1/3y1比2y2大1
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![初一数学解方程问题:已知y1=2x+3,y2=1-1/2x已知y1=2x+3,y2=1-1/2x.当x取何值,y1-3y2=0当x取何值,1/3y1比2y2大1](/uploads/image/z/991227-3-7.jpg?t=%E5%88%9D%E4%B8%80%E6%95%B0%E5%AD%A6%E8%A7%A3%E6%96%B9%E7%A8%8B%E9%97%AE%E9%A2%98%EF%BC%9A%E5%B7%B2%E7%9F%A5y1%3D2x%2B3%2Cy2%3D1-1%2F2x%E5%B7%B2%E7%9F%A5y1%3D2x%2B3%2Cy2%3D1-1%2F2x.%E5%BD%93x%E5%8F%96%E4%BD%95%E5%80%BC%2Cy1-3y2%3D0%E5%BD%93x%E5%8F%96%E4%BD%95%E5%80%BC%2C1%2F3y1%E6%AF%942y2%E5%A4%A71)
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