解方程组15/(x+y-1)+4/(x-y-2)=5,10/(x+y-1)-6/(x-y-2)=-1{15/(x+y-1)+4/(x-y-2)=5{10/(x+y-1)-6/(x-y-2)=-1（可以用换元法）

解方程组(1/X+Y)-(1/Y-X)=8/15,(5/X+Y)-5/Y=4 用加减法解方程组{2X+4Y=15,2X-3Y=1 解方程组x-4y=-1x-4y=-12x+y=16 解方程组｛ 3x-4y(x-y)=3 { 2x-3y=1 二元二次方程组 解方程组：4x²-y²=0 ay+x=1 解方程组解方程组｛y=2x-7｛x+y+z=1｛3x-z=4 解方程组:2(x +y)-3(x-y)=3;4(x+ y)+ 3（x-y）=15 3/(X-Y)+10/(X+Y)=-5 2/(X-Y)-15/(X+Y)=1 解分式方程组 要求 解方程组：｛(X-1)(Y+1)=(X+1)(Y+1)｛X(2+Y)-6=Y(X-4) 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2(x-y)/3-x+y/4=-1 6(x-y)-4(2x-y)=16 解方程组3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1kkkkkkkk 解方程组3(x+y)-4(x-y)=4,x+y除以2+x-y除以6=1 解方程组：2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16 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 一题 4/x+y+6/x-y=39/x-y-1/x+y=1 解分式方程组：4/（x+y）+6/(x-y)=39/(x-y)-1/(x+y)=1