用代入消元法解下列方程组(1)2s+3t-1=0,4s-9t-8=0.(2)y=2x-3,3x+2y=8
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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.(2)y=2x-3,3x+2y=8
用代入消元法解下列方程组(1)2s+3t-1=0,4s-9t-8=0.(2)y=2x-3,3x+2y=8
用代入消元法解下列方程组(1)2s+3t-1=0,4s-9t-8=0.(2)y=2x-3,3x+2y=8
(2)3X+2(2X-3)=8
3X+4X-6=8
X=2
(1)10S-11=0
10S=11
S=11/10
4*11/10-9T-8=0
4.4-9T-8=0
T= -0.4