化简方程 x^2-3y^2+8x+6y+10=0和y^2-4x+2y+9=0

化简分式方程:x*x-xy-y*y/x*x-3x-6y+2xy 化简方程 x^2-3y^2+8x+6y+10=0和y^2-4x+2y+9=0 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) 2x+y等于6,x+3y+|3x-y|等于19,解此方程. [2(x-y)^5-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2[2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 2(X-Y)/3=(X+Y)/4 -1 6(X+Y)=4(2X-Y)+16解方程 解方程:x+2y+3z=8 x+3y+5z=6求x+y=? 方程2x+y=3,4x-y=-1,6x+y+z=8怎么解 4x-3y/x-2y÷6y-8x/y-2x 3(x-y)^2-7(x-y)+8(y-x)^2+6(y-x)合并同类项. 81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^2 平移坐标轴化简方程：X^2+2Y^2-4x+8y-5 |6x-4y-5|+3|8x-3y-2|=0 解方程 解方程 x+y=6 3y-2x=8 化简求值 y-{y-2x+[5x-3(y+2x)+6y]}其中x=-3分之一 y=8分之一 计算或化简：[（x-y）/(x+3y)]÷[（x²-y²）/(x²+6xy+9y²)]-（2y）/x+y 化简求值：已知x、y满足：x^2+y^2-4x+6y+13=0 求代数式 的值.(3x+y)^2-3(3x-y)(x+y)-(x-3y)(x+3y)急用！