解方程组(1)3x+2y=7,x-y=9,(2)3x+y=7,5x+3y=1
2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51 解方程组
解方程组﹛2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51
解二元一次方程组:{5(x+y)+3(x-y)=2{7(x+y)-3(x-y)=-6
解方程组{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5)
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+y)(x-2y)=-5 (x-y)(x+2y)=7
解方程组(1)3x+2y=7,x-y=9,(2)3x+y=7,5x+3y=1
解方程组,1、x/2=y/3 3x-5y=9 2、 x-2y=-7 3(x-2)=1-y
解方程组 (1){2x-y=5,x-2y=1 (2){7x+3y=5,-5x+6y=-9
解方程组{ 3x-4y(x-y)=3 { 2x-3y=1
解方程组1.x+1/3=5x-y/5 7y=5x+25 (x=2,y=5) 2.2x-y/5=x+y/3=3(x=8,y
已知方程组2X+Y=6和X-3Y=1不解方程组,求7Y(X-3Y)^2-(3Y-X)^3