8x+9y=2317x-6y=74
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8x+9y=2317x-6y=74
8x+9y=23
17x-6y=74
8x+9y=2317x-6y=74
8x+9y=23 (1)
17x-6y=74 (2)
(1)×2+(2)×3
16x+18y+51x-18y=46+222
67x=268
x=4
y=(23-8x)/9=-1
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
8x+9y=2317x-6y=74
已知X*X+Y*Y+6X-8Y+25=0 求(Y/X)+(X/Y)-2=?
x*x+2x-y*y+6y-8=0,x+y不等于2,求x-y的值
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y 联立方程 有的话
3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y
3x+2=y 5X+4=Y 7X+6=Y 9X+8=y 11x=y要如何计算
3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y怎么解
y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,无
化简 x / y(x+y) - y / x(x+y) =
9y=3x-(x-1),4(x+y)-(2x+4)=8y
3x-2y=9 x-3y=2 x+y=5 x+2y=3 y=x 2x+y=8
已知x的平方+y的平方-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值
x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空
【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y)