3(x-1)=y-31 5(y-1)=3(x+5)
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/27 08:05:42
3(x-1)=y-315(y-1)=3(x+5)3(x-1)=y-315(y-1)=3(x+5)3(x-1)=y-315(y-1)=3(x+5)先整理,可以得到2个新式子:3X+28=Y,3X+20=
3(x-1)=y-31 5(y-1)=3(x+5)
3(x-1)=y-31 5(y-1)=3(x+5)
3(x-1)=y-31 5(y-1)=3(x+5)
先整理,可以得到2个新式子:3X+28=Y,3X+20=5Y,分别定为3式,4式,再用4式减去3式得4Y=-8,所以Y=-2,代入得到X=-10
由1式可得:y=3x+28带入2式,则:5(3x+27)=3(x+5),解得x=-10,y=-2
x=-35/3
y=-7
(x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5)
{(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=?
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
y''-5y'+6y=3x+1通解
y(x+y)+(x-y)²-(x+y)(x-y),其中x=-1/3,y=3
5(x-y)³-3(x-y)²+7(x-y)-5(x-y)³+(x-y)²-5(x-y),其中,x-y=1/3.5(x-y)³-3(x-y)²+7(x-y)-5(x-y)³+(x-y)²-5(x-y),其中,x-y=1/3先化简,再求值;
y'=(x-y+1)/(x+y-3)通解
x+y=1 5x-2y=8 3x-y=7 2x-y=3x表示y和用y表示x
(x+2y)(x-2y)-(2x-y)的平方+(3x-y)(2x-5y)其中x=-1 y=13分之1
若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值
(2x+y-1)(2x-y+1)-(3x+y)(3x-y),其中x=5分之1,
{3(x+y)+3(y+x)=1,3(x+y)+4(y-x)=-1
(3x-y)^2+(3x+y)(3x-y),x=1,y=-2
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
二元一次方程 :2(x+y)-(x-y)=3 (x+y)-2(x-y)=1
(x-y)^2+(x+y)(x-y) 其中 X =3 Y=-1