x-3y=2 -2x+6y=5 和 x-3y=2 -2x+6y=-4

x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2 6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5 5X+Y=3 X+5Y=2 求x和y.5X+Y=3X+5Y=2求x和y. 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) x+y=1 5x-2y=8 3x-y=7 2x-y=3x表示y和用y表示x (x-2y)(x+y)-2x(-2x-3y)+6x(-x-y),其中x=-1,y=2要讲解和答题 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 已知X,Y,满足(X+3Y)(X-3Y)=-10(Y^2-6/5)和2X(Y-1)+4(1/2X-1)=0 （X+Y)^2 X^2Y+XY^2注：*/* 是分数 3x+5y-(x+y)=6 2(x+y)-3x=-7 (2x-2y)/3-(x-y)=-1和6(x+y)-4(2x-y)=16 3x+2y=5 3y+2x=5 求x和y 解方程组3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1kkkkkkkk 5x+y=2,x-3y=4,求x和y, 5x+y=2 x-3y=4 求x和y 作出y=x+5x-6和y=-x+2x的图像 （x+y）/2- x-y/2=6 3(x+y)=4(x-y) x+y/3+x-y/2=6 4(x+y)-2(x-y)=40