x+2y+==5Cau 8:Nghiem cua he phuong trinh2x-5y-==-7 la C x+y+==10(-(17)/3,-5,-(62)/3) (-(47)/3,52/3) (-(17)/3,-5.(62)/3)(-11:5:-4). 相关知识点: 试题来源: 解析 CLời giảiChọn CTa có: I/0. ...