2x-1-3(y-2)=x 2(x-1)-y=4y-18,
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/12 18:36:05
x)355֨5ҴP0 r5u+mM*u
-tl /!Ɣ
]J[]SG
ˀHPf)P&n>e#P.PluH[]3<;6`NH, C8
2x-1-3(y-2)=x 2(x-1)-y=4y-18,
2x-1-3(y-2)=x 2(x-1)-y=4y-18,
2x-1-3(y-2)=x 2(x-1)-y=4y-18,
x-3y=-5 ……(1)
2x-5y=-16 ……(2)
由(1)*2-(2)得
x=-23
Y=-6
X=-23,Y=-6
函数,y=3x/(x^2+x+1) ,x
函数y=3x/(x^2+x+1) (x
若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值
化简 3x(x^2-x-1)-(x+1)(3x^-x) X^3(x-y)+x(y-x)
(3x-y)^2+(3x+y)(3x-y),x=1,y=-2
二元一次方程 :2(x+y)-(x-y)=3 (x+y)-2(x-y)=1
(x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5)
2(x+y)-3(x-y)=1 6(x+y)+(x-y)=51
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
变量x,y满足约束条件,x+y>=3,x-y>=-1,2x-y
(x-y)^2+(x+y)(x-y) 其中 X =3 Y=-1
y=(2x*x-2x+3)/(x*x-x+1),求值域?
求值域 1,y=(x+2)/(x*x+3x+6) 2,y=3x/(x*x+4)
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x²
x+y+2(-x-y+1)=3(1-y-x)-4-(y+x-1),x+y=?
{(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=?
[3x^2-(x+y)(y-x)][2(-x-y)(y-x)+2x^2+3y^2],其中x=-2分之1,y=1.5