解方程组(1)x-4y=6 3x+4y=2 (2)3x+2y=-5 5x-8y=-31
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]=2
解方程组:x+y/2+x-y/3=6 4(x+y)-5(x-y)=12
方程组x-2y=8,3x-4y=5,x=?,y=?
解方程组(1)x-4y=6 3x+4y=2 (2)3x+2y=-5 5x-8y=-31
解方程组:2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
解方程组 x-y/3-x+y/4=2 x-y/6-x+y/8=3
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 解方程组
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
x+y/2+x-y/3=6,4(x+y)-5(x-y)=2用加减消元法解方程组
解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27全过程、快