解方程组1.3x-2y=1 2x-5y=-252.3x-2y=4,2x-3y=-5

解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7 解方程组:x+y=2x+y+1=5x+2y+1 解方程组{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5) 解方程组 3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1 解方程组:{3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1} 解方程组6(x-y)-7(x+y)=21 2(x-y)-5(x+y)=-1 3/(X-Y)+10/(X+Y)=-5 2/(X-Y)-15/(X+Y)=1 解分式方程组 解方程组 2x-y=5 2y/x-x/y=12x-y=52y/x-x/y=1 二元一次方程组 2(X+Y)-(X-Y)=3 (X+Y)-2(X-Y)=1 解方程组二元一次方程组 2(X+Y)-(X-Y)=3 (X+Y)-2(X-Y)=1 解二元一次方程组 x+y=3 1/2(x+y)-3y=5 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{x+y=8,5x-2(x+y)=-1 解方程组：{3|x|-2y=8 2|x|+5y-1}解方程组：3|x|-2y=8 2|x|+5y-1 解方程组 x+y=1 |√(x+2)+y-√(x-2)+y|=2 解方程组3x+5(x+y)=2 3y-2(x+y)=4 x+y+xy=5 (x^2)y+x(y^2)=6 解方程组 解方程组｛ 3x-4y(x-y)=3 { 2x-3y=1 解方程组,(x+y)^2-3(x+y)=0和x-y=1