(-x+6):(x-y);(4x+y)=3;14:1,求x+y的值.
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(-x+6):(x-y);(4x+y)=3;14:1,求x+y的值.(-x+6):(x-y);(4x+y)=3;14:1,求x+y的值.(-x+6):(x-y);(4x+y)=3;14:1,求x+y的
(-x+6):(x-y);(4x+y)=3;14:1,求x+y的值.
(-x+6):(x-y);(4x+y)=3;14:1,求x+y的值.
(-x+6):(x-y);(4x+y)=3;14:1,求x+y的值.
(-x+6):(x-y):(4x+y)=3:14:1
所以(-x+6)/3=(x-y)/14=(4x+y)/1
(-x+6)/3=(4x+y)/1
-x+6=12x+3y
13x+3y=6 (1)
(x-y)/14=(4x+y)/1
x-y=56x+14y
55x+15y=0 (2)
(2)-(1)*4
55x+15y-52x-12y=0-24
3x+3y=-24
x+y=-8
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6
（x+y）/2- x-y/2=6 3(x+y)=4(x-y)
x+y/3+x-y/2=6 4(x+y)-2(x-y)=40
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
x+x+x+y=60 .x-y=4
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
化简 x / y(x+y) - y / x(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,求x+y的值.
1.(x-2y)(x+2y)-(x平方+y)(x平方-y) 2.(2x-y)(y+2x)-(2y+x)(2y-x)3.已知：x+y=6,x平方-y平方=48,求x,y的值4.x平方-2x分之x+2 -- x平方-4x+4分之x-1
y=-6/x (x
7x:4y,x:y=( ):(
(x-4y)(2x+y)=
5x-4y(y-x)=?