9s-13t=-12 s=2-3t 求s,t
来源：学生作业帮助网 编辑：六六作业网 时间：2024/05/03 12:55:49
9s-13t=-12s=2-3t求s,t9s-13t=-12s=2-3t求s,t9s-13t=-12s=2-3t求s,t9(2-3t)-13t=-12;18-27t-13t=-12;-40t=-30t
9s-13t=-12 s=2-3t 求s,t
9s-13t=-12 s=2-3t 求s,t
9s-13t=-12 s=2-3t 求s,t
9(2-3t)-13t=-12;
18-27t-13t=-12;
-40t=-30
t=0.75;
s=2-3*0.75=-0.25
s=-1/4,t=3/4
t=0.75
s=-0.25
t=3/4,s=-1/4
s=-1/4
t=3/4