三个方程组,①x-y=3 ②2(x-y+1)=4(x+y)-6 3x-8y=14 x/2+y/4=-3
三个方程组,①x-y=3 ②2(x-y+1)=4(x+y)-6 3x-8y=14 x/2+y/4=-3
解方程组 x-y/3-x+y/4=2 x-y/6-x+y/8=3
解方程组:2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
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
解二元一次方程组{3(x+y)-(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:(0.2x+0.1y)/2- (4x-y)/10=(x-y)/5+ (3x+0.5y)/30 (3x+2y-1
不解方程组x+4y=6 x-3y=1求代数式7y(x-3y)的平方-2(3y-x)的立方
方程组x-2y=8,3x-4y=5,x=?,y=?
解方程组{ 3x-4y(x-y)=3 { 2x-3y=1