{ X-3Y=5
问题描述:
{ X-3Y=5
{ (代入消元法)
{ 2X+4Y=11
答
X=5+3Y
2(5+3Y)+4Y=11
10+6Y+4Y=11
6Y+4Y=1
(6+4)Y=1
10Y=1
Y=0.1
X=5+3Y
代入Y=0.1
X=5+3*0.1
=5+0.3
=5.3
{X=5.3
{
{Y=0.1