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

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