7-x+3y=3y+4+5 7-x+3y=7-3x+5怎么解
来源:学生作业帮助网 编辑:作业帮 时间:2024/10/03 21:12:38
x)36566Uu+M5=bb"}ِm& ,\[KL.
(
pAm#b[BS b_\gu
dw=OMZO[>`c-sm3K,Ktcn9
7-x+3y=3y+4+5 7-x+3y=7-3x+5怎么解
7-x+3y=3y+4+5 7-x+3y=7-3x+5怎么解
7-x+3y=3y+4+5 7-x+3y=7-3x+5怎么解
7-x+3y=3y+4+5 7-x+3y=3y+9 7-x=9 x=-2
7-x+3y=7-3x+5 7-x+3y=12-3x 7+2+3y=12+6 3y=18-9 y=3
从1式得7-x=9 x=-2
代入到2式中 7+2+3y=7+6+5 3y=9 y=3
(3x-4y)(5x-4y)-(7x-8y)(6y-5x)
计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
计算3x/(x-3y)+(x+y)/(4y-x)-7y/(x-4y)=?
把(x-y)看作一个整体,化解:5(x-y)+2(x-y)-4(x-y)= 3(x-y)把(x-y)看作一个整体,化解:5(x-y)+2(x-y)-4(x-y)=3(x-y)²-4(x-y)+7(x-y)-6(x-y)²=
把(x-y)看做一个整体,合并同类项5(x-y)+2(x-y)-4(x-y)=3(x-y)次方-4(x-y)+7(x-y)-6(x-y)次方=
大括号x+y/2+x-y/3=11/6 4(x+y)-5(x-y)=7 快
初二上学期方程题 4x+y=5 5x+4y=63x-2y=1 2x+3y=13x-2y=7 7x+5y=32x+3y=17 2x-y=-4x+5y=6 2x+y=23x-6y=4 3x+2y=52x+y=73x-4y=53x+y=1x-2y=-1x+y=42x+3y=92x-3y=74x+5y=3x+y=20004x+6y=90003x+5y=113x-2y=42x+3y=215x-2y=5x+y=54x+3y=182x+3y=16x+4y=132x+3y=40x
已知(3x+1)(3x-3)-3x+2)^2=-7,(y+7)(y-7)-y(y-7)=0,求8y^2-5y(-y+3x)+4y(-4y-5/2x)的值
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;
(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
x-4y分之3x + 4y-x分之x+y - x*x-4y分之7y
已知(x+y)2 =2,(x-y)3 =3,求(x+y)7(x-y)2(x+y)3(y-x)4 的值
x+y=1 5x-2y=8 3x-y=7 2x-y=3x表示y和用y表示x
21/(x+y)+4/(x-y)=12/(x+y)+7/(x-y)结果为(x+y)/(x-y)=3求过程!
已知实数x.y满足根号(x+y-8)+根号(8-x-y)=根号(3x-y-4)+根号(x-2y+7),求x,y
(x-y)的4次方/(y-x)的3次方+(x-y)0的次方*(y-x)+(-x-y)7次方/(x+y)6次方=
(5x+3y)(3y-5x)-(4x-y)(4y+x)=