用代入消元法解下列方程组(1)2s+3t-1=0,4s-9t-8=0
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![用代入消元法解下列方程组(1)2s+3t-1=0,4s-9t-8=0](/uploads/image/z/2430121-49-1.jpg?t=%E7%94%A8%E4%BB%A3%E5%85%A5%E6%B6%88%E5%85%83%E6%B3%95%E8%A7%A3%E4%B8%8B%E5%88%97%E6%96%B9%E7%A8%8B%E7%BB%84%281%292s%2B3t-1%3D0%2C4s-9t-8%3D0)
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用代入消元法解下列方程组(1)2s+3t-1=0,4s-9t-8=0
用代入消元法解下列方程组(1)2s+3t-1=0,4s-9t-8=0
用代入消元法解下列方程组(1)2s+3t-1=0,4s-9t-8=0
2s+3t=1
4s-9t=8
s=1-3t除以2
带入第二个式子得
t=-0.4
s=1.1
楼上你看错题了吧
2s+3t=1
4s-9t=8
s=1-3t除以2
带入第二个式子得
t=-0.4
s=1.1
楼上你看错题了吧