解方程组2x+y=40,x+1/2y=20
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
解方程组{ 3x-4y(x-y)=3 { 2x-3y=1
已知方程组4x+2y=1,20x+8y,求x,y
解方程组:解方程组:|X+Y|=1|X|+2|Y|=3
解方程组{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5)
要求 解方程组:{(X-1)(Y+1)=(X+1)(Y+1){X(2+Y)-6=Y(X-4)
数学书解方程组{2(x+y)-(x-y)=3,(x+y)-2(x-y)=1
解方程组:(x+3)(y-2)=(x-3)(y+10),(x+1)(y+3)=(x-2)(y+12)
解方程组:2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51 解方程组
解二元一次方程组{3(x+y)-(x-y)=4,x+y/2+x-y/6=1
解方程组﹛2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51