作业帮若(-x+6):(x-y):(4x+y)=3:14:1,求x+y
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/27 21:23:47
若(-x+6):(x-y):(4x+y)=3:14:1,求x+y
若(-x+6):(x-y):(4x+y)=3:14:1,求x+y
若(-x+6):(x-y):(4x+y)=3:14:1,求x+y
(-x+6):(x-y):(4x+y)=3:14:1
(6-x)/3=(x-y)/14=(4x+y)/1
84-14x=3x-3y 84=17x-3y (1)
6-x=12x+3y 6=13x+3y (2)
两式相加
30x=90 x=3
y=-11
x+y=-8
x=3,y=-11.把它拆成(-x+6):(x-y)=3:14和(x-y):(4x+y)=14:1联立一解就出来了。
-8
(-x+6):(x-y):(4x+y)=3:14:1.
(-x+6)/3=(x-y)/14=(4x+y)/1=K,
-x+6=3K,x-y=14K,4x+y=K.
x=6-3K,y=6-3K-14K=6-17K,4(6-3K)+6-17K=K,K=1,
x+y=6-3K+6-17K=12-20K=-8
若(-x+6):(x-y):(4x+y)=3:14:1,求x+y
若(-x+6):(x-y):(4x+y)=3:14:1,求x+y
【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y)
若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7
若X-Y>X,X+Y
x(x-y)+4(y-x)因式分解
{(x,y) |x|+|y|
x>y?x:y
(x+y)(x-y)+4(y-1)
(x+4y-6)(x-4y+6)-(4y+x+6)(4y-x-6)
若5x-4y=6,4x-5y=8,则x+y=( ),x-y=( )
若5x+3y=3x+4y=x+2y+6,则x+y=___
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
(3x-4y)(5x-4y)-(7x-8y)(6y-5x)
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^2
（y-x)+x(x-y)^3-(y-x)^4 因式分解
4x-3y/x-2y÷6y-8x/y-2x