Y-X=45 (85%Y-X)×8=(Y-35-X)×12 Y-X=45 (85%Y-X)×8=(Y-35-X)×12
来源：学生作业帮助网 编辑：六六作业网 时间：2024/05/16 16:08:37
Y-X=45(85%Y-X)×8=(Y-35-X)×12Y-X=45(85%Y-X)×8=(Y-35-X)×12Y-X=45(85%Y-X)×8=(Y-35-X)×12Y-X=45(85%Y-X)×8
Y-X=45 (85%Y-X)×8=(Y-35-X)×12 Y-X=45 (85%Y-X)×8=(Y-35-X)×12
Y-X=45 (85%Y-X)×8=(Y-35-X)×12
Y-X=45
(85%Y-X)×8=(Y-35-X)×12
Y-X=45 (85%Y-X)×8=(Y-35-X)×12 Y-X=45 (85%Y-X)×8=(Y-35-X)×12
Y-X=45 ①
(85%Y-X)×8=(Y-35-X)×12
简化得：
(0.85y-x)8=(-35+45)*12
0.85y-x=15 ②
①-②得：
0.15y=30
∴y=200
x=155
因为Y-X=45
(85%Y-X)×8=(Y-35-X)×12
(Y-X-15%Y)×8=(Y-X-35)×12(45-15%X)×8=(45-35)×12360-1.2X=120-1.2X=-240X=200
(85%Y-X)×8=(Y-35-X)×12
85%Y-X=（Y-X-35）×12/8
因为Y-X=45 带入得：
85%Y-X=(45-35)×1.5
85%Y-X=10×1.5=15
因为Y-X=45 所以X=Y-45带入得：
85%Y-Y+45=15
解得：Y=200
X=Y-45=155
Y-X=45 (85%Y-X)×8=(Y-35-X)×12 Y-X=45 (85%Y-X)×8=(Y-35-X)×12
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
化简 x / y(x+y) - y / x(x+y) =
x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空
x+x+y+y+y=21 ,x+x+y+y+y+y+y=27 ,x ,y=?
x+x+y+y+y=21 ,x+x+y+y+y+y+y=27 ,x ,y=?
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
(x+y)/y=8/3则x/y=__ y/x-y=___
(x+y)/y=8/3则x/y=__ y/x-y=___
12y(x-y)^2-8(x-y)^3=?
y+y+x=10,x+y+x=8,y=?,x=?
已知x-y=8,（x+y)(x-y)=32,求x,y的值
X+Y-8X+10Y+41=O,求X/Y-Y/X的值
x+x+x+x+y+y+y=56
y=x(x
：y' +y= cos x y=
微分方程y - 2y' + y = x
求y'=y/(y-x)