方程组：3x=4y x-2y=-4

方程组x-2y=8,3x-4y=5,x=?,y=? 解方程组｛ 3x-4y(x-y)=3 { 2x-3y=1 解方程组x+y/3=x-y/4 2x+3y=11 解方程组X+Y/2=3X-2Y=10+6X+Y/4 已知方程组{3x+4y=10 4x+3y=-2,不解方程组则x+y= 解方程组：2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16 3(x+y)—4(x-y)=4,(x+y/2)+(x-y/6)=1.解方程组 一道二元一次方程组!3(x+y)-4(x-y)=4,(x+y)/2+(x-y)/6=1 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=1 解方程组 x-y/3-x+y/4=2 x-y/6-x+y/8=3 x+y/2+x-y/3=6,4(x+y)-5(x-y)=2用加减消元法解方程组