{4x-3y-10=0 3x-2y=0,{3x-4(x-y)=2 2x-3y=1,{2(x+y)-(x-y)=3 (x+
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/10/02 20:23:33
{4x-3y-10=0 3x-2y=0,{3x-4(x-y)=2 2x-3y=1,{2(x+y)-(x-y)=3 (x+y)-2(x-y)=1
4x-3y-10=0 8x-6y=20
3x-2y=0 9x-6y=0
x=-20,y=-30
3x-4(x-y)=2 3x-4x+y=2 x-y=-2 3x-3y=-6
2x-3y=1
x=-7,y=-5
2(x+y)-(x-y)=3 4(x+y)-2(x-y)=6
(x+y)-2(x-y)=1 2(x+y)-4(x-y)=2
3(x+y)=5 3(x-y)=1
3x+3y=5 3x-3y=1
6x=6 ,x=1,y=2/3
3x-2y=0 9x-6y=0
x=-20,y=-30
3x-4(x-y)=2 3x-4x+y=2 x-y=-2 3x-3y=-6
2x-3y=1
x=-7,y=-5
2(x+y)-(x-y)=3 4(x+y)-2(x-y)=6
(x+y)-2(x-y)=1 2(x+y)-4(x-y)=2
3(x+y)=5 3(x-y)=1
3x+3y=5 3x-3y=1
6x=6 ,x=1,y=2/3
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
(x+y)(x+2y)(x+3y)(x+4y)=-40
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-(
已知3x^2+xy-2y^2=0,求{(x+y)/(x-y)+4xy/(y^2-x^2)}/{(x+3y)*(x-y)}