解方程组:x²-4y²+x+3y-1=0 和2x-y-1=0
解方程组 2x-y-1=0 x²-4y²+x+3y-1=0
解方程组 y²-3x²+x+1=0 2x-y=1
解方程组3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1
解方程组{ 3x-4y(x-y)=3 { 2x-3y=1
解方程组:2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
解二元一次方程组{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)-(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
若方程组3x+y=k+1和x+3y=3的解x,y满足0
解方程组 (1)2x-y=3 (2)x²+y²+2x-24=0
已知方程组{2x+y=6,x-3y=1,不解方程组,求7y(x-3y)²-(3y-x)²的值.
解方程组:(x-1)(y-2)=xy和x(x+2)-4y(y-1)=(x+2y)(x-2y)