解方程组 (1\x+1\y)*16=1 9*(1\x+1\y)+21*(1\y)=1
解方程组{4/x+y+6/x-y=3, 9/x-y-1/x+y=1
解方程组:{4/x+y+6/x-y=3 9/x-y-1/x+y=1}
解方程组:2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
解方程组{ 3x-4y(x-y)=3 { 2x-3y=1
解关于X,Y的方程组 {x+y=a (a-1)x+y=5
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
用加减法解方程组:{(x+y)/6+(x-y)/10=3 (x+y)/6+(y-x)/10=-1
2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51 解方程组
解方程组:(x+3)(y-2)=(x-3)(y+10),(x+1)(y+3)=(x-2)(y+12)
解二元一次方程组{3(x+y)-(x-y)=4,x+y/2+x-y/6=1