①.已知直线y=ax+b进过点(1,2)和(2,3),则a=( ),b=( )②.方程组/x+y=15的解为( ),则直线y=-x+15和y=x-7的交点坐标是( )、x-y=7③.已知函数y=mx-(4m-3)的图像过原点,则m应取值为( )④.直
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![①.已知直线y=ax+b进过点(1,2)和(2,3),则a=( ),b=( )②.方程组/x+y=15的解为( ),则直线y=-x+15和y=x-7的交点坐标是( )、x-y=7③.已知函数y=mx-(4m-3)的图像过原点,则m应取值为( )④.直](/uploads/image/z/3870715-67-5.jpg?t=%E2%91%A0.%E5%B7%B2%E7%9F%A5%E7%9B%B4%E7%BA%BFy%3Dax%2Bb%E8%BF%9B%E8%BF%87%E7%82%B9%EF%BC%881%2C2%EF%BC%89%E5%92%8C%EF%BC%882%2C3%EF%BC%89%2C%E5%88%99a%3D%EF%BC%88+%EF%BC%89%2Cb%3D%EF%BC%88+%EF%BC%89%E2%91%A1.%E6%96%B9%E7%A8%8B%E7%BB%84%2Fx%2By%3D15%E7%9A%84%E8%A7%A3%E4%B8%BA%EF%BC%88+%EF%BC%89%2C%E5%88%99%E7%9B%B4%E7%BA%BFy%3D-x%2B15%E5%92%8Cy%3Dx-7%E7%9A%84%E4%BA%A4%E7%82%B9%E5%9D%90%E6%A0%87%E6%98%AF%EF%BC%88+%EF%BC%89%E3%80%81x-y%3D7%E2%91%A2.%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0y%3Dmx-%EF%BC%884m-3%EF%BC%89%E7%9A%84%E5%9B%BE%E5%83%8F%E8%BF%87%E5%8E%9F%E7%82%B9%2C%E5%88%99m%E5%BA%94%E5%8F%96%E5%80%BC%E4%B8%BA%EF%BC%88+%EF%BC%89%E2%91%A3.%E7%9B%B4)
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