解方程组x+y=49,12x:18y=1:2
解方程组:(x+3)(y-2)=(x-3)(y+10),(x+1)(y+3)=(x-2)(y+12)
1/2x-2y=-74,x-6y=-12解方程组,x/5-y/2=2,2x+3y=4解方程组
解方程组{ 3x-4y(x-y)=3 { 2x-3y=1
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
解方程组:解方程组:|X+Y|=1|X|+2|Y|=3
解方程组{x(x+y+z)=6,y(x+y+z)=12,z(x+y+z)=18
解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66
解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66
解方程组{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5)
解方程组:x+y/2+x-y/3=6 4(x+y)-5(x-y)=12
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