{x=y-3 {x+y=11 {2x+y=13 {3x-2y=81.{x=y-3 {x+y=112.{2x+y=13 {3x-2y=8
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/01 19:14:18
![{x=y-3 {x+y=11 {2x+y=13 {3x-2y=81.{x=y-3 {x+y=112.{2x+y=13 {3x-2y=8](/uploads/image/z/2668562-26-2.jpg?t=%7Bx%3Dy-3+%7Bx%2By%3D11+%7B2x%2By%3D13+%7B3x-2y%3D81.%7Bx%3Dy-3+%7Bx%2By%3D112.%7B2x%2By%3D13+%7B3x-2y%3D8)
x)5VЮ54T63Fz*0$40 6l6
CM,H L ¶`!:^oi;~?ٱDMH#@"F`6H\ՄʂD̴M*\
[c3M͑M52
$ف
ۍ
{x=y-3 {x+y=11 {2x+y=13 {3x-2y=81.{x=y-3 {x+y=112.{2x+y=13 {3x-2y=8
{x=y-3 {x+y=11 {2x+y=13 {3x-2y=8
1.{x=y-3 {x+y=11
2.{2x+y=13 {3x-2y=8
{x=y-3 {x+y=11 {2x+y=13 {3x-2y=81.{x=y-3 {x+y=112.{2x+y=13 {3x-2y=8
(1){x=y-3 {x+y=11
y-3+y=11
2y=14
y=7
x=y-3=7-3=4
所以原方程组的解为x=4,y=7
(2){2x+y=13 {3x-2y=8
y=13-2x
3x-2(13-2x)=8
3x-26+4x=8
7x=34
x=34/7
y=13-2x=23/7
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
(x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
(x+y)(2x-3y)=?
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
已知x-y=3,求[(x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值
已知3x =2y 求x/x+y+y/x-y-y²/x²-y²
(x+y)(x+2y)(x+3y)(x+4y)=-40y的值为根号11
若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值
根据3(x+y)-2(x-y)=11,4(x+y)+3(x-y)=9可得出x+y= ,x-y=
(x+y-5)*(x+y-5)+(x-y+3)=0 x*x-y*y
已知:3x-5y=0,求x/y,x-y/y,x-y/x
6(x+y)的平方-11(x+y)(x-y)+3(x-y)的平方=?
{(x+2)^2-(y-3)^2=(x+y)(x-y) {x-3y=2