x:3=y:4 4x-5y=-8 解方程组 冒号是比
用代入法解方程组2X-Y=-1,3X+4Y=-18,这是第一个方程组.第二个方程组是5X-8Y=11,2X-14Y=-1
方程组x-2y=8,3x-4y=5,x=?,y=?
方程组3x+7y=9 4x-7y=5的解是
解方程组 x-y/3-x+y/4=2 x-y/6-x+y/8=3
解方程组24/(x+y) +24/(x-y) = 7/3 ,8/(x+y) +18/(x-y) = 4/3
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 解方程组
解方程组 {(x+y)/2+(x-y)/3=6 5(x+y)-2(x-y)=4
解方程组:x+y/2+x-y/3=6 4(x+y)-5(x-y)=12
解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27全过程、快
解方程组 X+Y/2+X-Y/3=6 4[X+Y]-5[X-Y]=2
解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27
解下列方程组 3x=4(x-y) x-8(x-y)=5