如果“x”,“y”满足两个条件“2x-3y=4","x+2y>1”,求x,y的取值范围.
问题描述：
如果“x”,“y”满足两个条件“2x-3y=4","x+2y>1”,求x,y的取值范围.
答
x=(4+3y)/2
(4+3y)/2+2y>1
2+3/2y+2y>1
3/2y+2y>-1
3y+4y>-2
y>-2/7
x>[4+3(-2/7)]/2
x>2-3/7
x>11/7