解方程组:{3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1}

解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7 解方程组: ｛3x+2y=13 3x-2y=5 ｛x-y/3=x+y/2+1 2x-5y=9 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=2:3和5x+3y=38 3y+x/y=8和9y-2x/y=9 解方程组｛ 3x-4y(x-y)=3 { 2x-3y=1 解二元一次方程组 x+y=3 1/2(x+y)-3y=5 解方程组：（0.2x+0.1y）/2- （4x-y）/10=（x-y）/5+ (3x+0.5y)/30 (3x+2y-1 解二元一次方程方程组 3x+5y=8 2x-3y=-1的方程组 x+y=9 3(x+y)+2x=33已知方程组2x-y= 解方程组 2x+y(y-2x)=9 (x+y)(x+y-3)=10 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)+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