解方程组 3x+2y=9 2x-5y=-13

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(x+y)(x-2y)=-5 (x-y)(x+2y)=7 解方程组3x+5(x+y)=2 3y-2(x+y)=4 解方程组 y=2x x+y=3 解方程组3分之x-y=2分之 x+y解方程组3分之x-y=2分之 x+y；2x-5y=7 解方程组: ｛3x+2y=13 3x-2y=5 ｛x-y/3=x+y/2+1 2x-5y=9 解分式方程组x+y/3-3/x-y=2 x+y/5+2/x-y=5 解方程组 2x+y(y-2x)=9 (x+y)(x+y-3)=10十万火急!求解! 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+Y/2+X-Y/3=6 4[X+Y]-5[X-Y]=2 解二元一次方程组{x+y/2+x-y/3=6,4(x+y)-2=5(x-y) 解方程组2分之x+y+3分之x-y=6 4(x+y)-5(x-y)=2 解方程组 {(x+y)/2+(x-y)/3=6 5(x+y)-2(x-y)=4 3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 解方程组 解方程组 (x+y)^2-3(x+y)=54 (x-y)^2-5(x-y)=14 解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27