2x+3y=4① x+2y≥1② x,y的取值范围
问题描述:
2x+3y=4① x+2y≥1② x,y的取值范围
答
① x=(4-3y)/2
代入②
y>=-2
同理
x能否再详细点呢①把3y移到右边,把2除过来 2x+3y=4 x=(4-3y)/2x+2y≥1(4-3y)/2+2y≥12-3/2y+2y≥11/2y≥-1y≥-2同理x,