已知一次函数y=(3a-12)x-2+a的图像与y轴的交点在x轴的上方且y随x的增大而减小,则整数a=_____
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![已知一次函数y=(3a-12)x-2+a的图像与y轴的交点在x轴的上方且y随x的增大而减小,则整数a=_____](/uploads/image/z/4485789-45-9.jpg?t=%E5%B7%B2%E7%9F%A5%E4%B8%80%E6%AC%A1%E5%87%BD%E6%95%B0y%3D%283a-12%29x-2%2Ba%E7%9A%84%E5%9B%BE%E5%83%8F%E4%B8%8Ey%E8%BD%B4%E7%9A%84%E4%BA%A4%E7%82%B9%E5%9C%A8x%E8%BD%B4%E7%9A%84%E4%B8%8A%E6%96%B9%E4%B8%94y%E9%9A%8Fx%E7%9A%84%E5%A2%9E%E5%A4%A7%E8%80%8C%E5%87%8F%E5%B0%8F%2C%E5%88%99%E6%95%B4%E6%95%B0a%3D_____)
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