初一下学期数学书114页习题8.4的1、2题急求初一下学期(人教版)114页习题8.4第1、2题答案,和115页第5题答案,三元一次方程组:(1)4x+9y=12,3y—2z=1,7x+5z=4/19 (2)4x—9z=17,3x+y+15z=18,x+2y+3z=2
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![初一下学期数学书114页习题8.4的1、2题急求初一下学期(人教版)114页习题8.4第1、2题答案,和115页第5题答案,三元一次方程组:(1)4x+9y=12,3y—2z=1,7x+5z=4/19 (2)4x—9z=17,3x+y+15z=18,x+2y+3z=2](/uploads/image/z/117080-8-0.jpg?t=%E5%88%9D%E4%B8%80%E4%B8%8B%E5%AD%A6%E6%9C%9F%E6%95%B0%E5%AD%A6%E4%B9%A6114%E9%A1%B5%E4%B9%A0%E9%A2%988.4%E7%9A%841%E3%80%812%E9%A2%98%E6%80%A5%E6%B1%82%E5%88%9D%E4%B8%80%E4%B8%8B%E5%AD%A6%E6%9C%9F%EF%BC%88%E4%BA%BA%E6%95%99%E7%89%88%EF%BC%89114%E9%A1%B5%E4%B9%A0%E9%A2%988.4%E7%AC%AC1%E3%80%812%E9%A2%98%E7%AD%94%E6%A1%88%2C%E5%92%8C115%E9%A1%B5%E7%AC%AC5%E9%A2%98%E7%AD%94%E6%A1%88%2C%E4%B8%89%E5%85%83%E4%B8%80%E6%AC%A1%E6%96%B9%E7%A8%8B%E7%BB%84%EF%BC%9A%EF%BC%881%EF%BC%894x%2B9y%3D12%2C3y%E2%80%942z%3D1%2C7x%2B5z%3D4%2F19+%EF%BC%882%EF%BC%894x%E2%80%949z%3D17%2C3x%2By%2B15z%3D18%2Cx%2B2y%2B3z%3D2)
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