3(X-1)=Y+5 5(Y-1)=3(x+5) 解下列方程组
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/22 22:30:24
3(X-1)=Y+55(Y-1)=3(x+5)解下列方程组3(X-1)=Y+55(Y-1)=3(x+5)解下列方程组3(X-1)=Y+55(Y-1)=3(x+5)解下列方程组3(X-1)=Y+5(1)
3(X-1)=Y+5 5(Y-1)=3(x+5) 解下列方程组
3(X-1)=Y+5 5(Y-1)=3(x+5) 解下列方程组
3(X-1)=Y+5 5(Y-1)=3(x+5) 解下列方程组
3(X-1)=Y+5(1)
5(Y-1)=3(x+5)(2)
由(1)得:3x-y=8(3)
由(2)得到:3x-5y=-20(4)
(3)-(4)得:4y=28
y=7
把y=7代入(3)得到:3x-7=8
3x=15
x=5
所以:此方程组的解是
x=5
y=7
x=5
y=7
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)/(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
1.5(x+y)+3(x-y)=27(x+y)-3(x-y)=-62.x-y/7 - x+y/10 =1/22(x-y)-5(x+y)=3所谓细节决定成败,
10/x+y+3/x-y=-5 15/x+y-2/x-y=-1(用换元法解此方程组)
y(x+y)+(x-y)²-(x+y)(x-y),其中x=-1/3,y=3
x+y=1 5x-2y=8 3x-y=7 2x-y=3x表示y和用y表示x
(5x-y)(y+5x)-(3y+2x)(3y-2x) x=1 y=2先化简再求值
(x+2y)(x-2y)-(2x-y)的平方+(3x-y)(2x-5y)其中x=-1 y=13分之1
先化简再求值(x-y)(x-2y)-1/2(2x-3y)(x+2y),其中x=2,y=2/5
先化简,再求值:[(x+2y)²-(x+y)(3x-y)-5y²]÷2x,其中x=-2,y=1/2
先化简,再求值:[(x+2y)²-(x+y)(3x-y)-5y²]÷2x,其中x=-2,y=1/2
先化简,再求值:[(X+2Y)平方-(X+Y)(3X-Y)-5Y平方]除以(2X)其中X=-2,Y=1/2
(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
{5(x-3y)-6=2x+1 3(x+6y)+4=9y+19 {3分之2(x-y)=4分之x+y-1 6)x+y)=4(2x-y)+16