判断方程组：2x+3y=4 6x-y=8的解的符号情况

判断方程组：2x+3y=4 6x-y=8的解的符号情况 解方程组 x-y/3-x+y/4=2 x-y/6-x+y/8=3 解方程组8/(x+y) +(x-y)/2=3,6/(x+y)-(x-y)/4=1 既不解方程组也不画图像,判断方程组解的情况①2x+y=4,2x-3y=12②3x-4y=5,6x-8y=12③2x+3y=5,6y=10-4x就说清每个方程组有解还是无解还是有无数组解 方程组x-2y=8,3x-4y=5,x=?,y=? 解方程组,x+y/2=3x-2y=10+6x+y/4, y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,无 解方程组;x+y/2=x-y/3=6 4(x+y)-3(x-y)=-20 解方程组2(x-y)/3-x+y/4=-1 6(x-y)-4(2x-y)=16 解方程组：2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16 解方程组 4(x+y)-(2x-y)=14 ,3(x+y)-2(2x-y)=8 2元一次方程组 2/x+y+3/x-y=6 4(x+y)-3(x-y)=-20 解二元一次方程组3(x+y)-4(x-y)=4 x+y/2+x-y/6=1 解方程组3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1kkkkkkkk 3(x+y)—4(x-y)=4,(x+y/2)+(x-y/6)=1.解方程组 解方程组3(x+y)-4(x-y)=4,x+y除以2+x-y除以6=1 一道二元一次方程组!3(x+y)-4(x-y)=4,(x+y)/2+(x-y)/6=1 解方程组⑴(x+y)/2-(x-y)/3=6,⑵3(x+y)=4(x-y)