解下列方程:1.-2/3x=1/5 2.3x+1=2x-53.1/3x+1/2=2/3 4.3=3/2x-6编一个方程,使它的解为x=-1/2已知:y1=4x+8,y2=3x-7(1) 当x取何值是,y1=y2?(2) 当x取何值是,y1与y2互为相反数?地球上的海洋面积约为陆地面积
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![解下列方程:1.-2/3x=1/5 2.3x+1=2x-53.1/3x+1/2=2/3 4.3=3/2x-6编一个方程,使它的解为x=-1/2已知:y1=4x+8,y2=3x-7(1) 当x取何值是,y1=y2?(2) 当x取何值是,y1与y2互为相反数?地球上的海洋面积约为陆地面积](/uploads/image/z/2768728-40-8.jpg?t=%E8%A7%A3%E4%B8%8B%E5%88%97%E6%96%B9%E7%A8%8B%EF%BC%9A1.-2%2F3x%3D1%2F5+2.3x%2B1%3D2x-53.1%2F3x%2B1%2F2%3D2%2F3+4.3%3D3%2F2x-6%E7%BC%96%E4%B8%80%E4%B8%AA%E6%96%B9%E7%A8%8B%2C%E4%BD%BF%E5%AE%83%E7%9A%84%E8%A7%A3%E4%B8%BAx%3D-1%2F2%E5%B7%B2%E7%9F%A5%EF%BC%9Ay1%3D4x%2B8%2Cy2%3D3x-7%EF%BC%881%EF%BC%89+%E5%BD%93x%E5%8F%96%E4%BD%95%E5%80%BC%E6%98%AF%2Cy1%3Dy2%3F%EF%BC%882%EF%BC%89+%E5%BD%93x%E5%8F%96%E4%BD%95%E5%80%BC%E6%98%AF%2Cy1%E4%B8%8Ey2%E4%BA%92%E4%B8%BA%E7%9B%B8%E5%8F%8D%E6%95%B0%3F%E5%9C%B0%E7%90%83%E4%B8%8A%E7%9A%84%E6%B5%B7%E6%B4%8B%E9%9D%A2%E7%A7%AF%E7%BA%A6%E4%B8%BA%E9%99%86%E5%9C%B0%E9%9D%A2%E7%A7%AF)
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