解二元一次不等式3(x+y0-4(x-y)=43(x+y)+(x-y)-6

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/22 12:15:49
解二元一次不等式3(x+y0-4(x-y)=43(x+y)+(x-y)-6解二元一次不等式3(x+y0-4(x-y)=43(x+y)+(x-y)-6解二元一次不等式3(x+y0-4(x-y)=43(x

解二元一次不等式3(x+y0-4(x-y)=43(x+y)+(x-y)-6
解二元一次不等式
3(x+y0-4(x-y)=4
3(x+y)+(x-y)-6

解二元一次不等式3(x+y0-4(x-y)=43(x+y)+(x-y)-6
x+y=u
x-y=v
3u-4v=4
3u+v=6
5v=2
v=2/5=x-y
3u=6-2/5=28/5,u=28/15=x+y
2x=2/5+28/15=34/15,x=17/15
2y=28/15-6/15=22/15,y=11/15
x=17/15,y=11/15