解方程组x-2y=o,3x+2y=8和y=2x-1,4x-3y=1
问题描述:
解方程组x-2y=o,3x+2y=8和y=2x-1,4x-3y=1
今天现在,要对,
答
x-2y=0,3x+2y=8
(1)+(2)
4x=8,x=2带入(1)
2-2y=0,y=1
y=2x-1,4x-3y=1
2x-y=1,4x-3y=1
(1)*2-(2)
y=1
2x-1=1,x=1