3X-5Y=-3 -4X+10Y=6
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![3X-5Y=-3 -4X+10Y=6](/uploads/image/z/578255-23-5.jpg?t=3X-5Y%3D-3+-4X%2B10Y%3D6)
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3X-5Y=-3 -4X+10Y=6
3X-5Y=-3 -4X+10Y=6
3X-5Y=-3 -4X+10Y=6
3X-5Y=-3 ①
-4X+10Y=6 ②
2①+②,得
2x=0
x=0
y=0.6
3(2X+Y)+(2(2x-Y)=6 (8X+4y)-(10X-5Y)=2
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian
(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+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
(5x+3y)(3y-5x)-(4x-y)(4y+x)=
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
(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
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
已知X,Y,满足(X+3Y)(X-3Y)=-10(Y^2-6/5)和2X(Y-1)+4(1/2X-1)=0 (X+Y)^2 X^2Y+XY^2注:*/* 是分数
化简求值:(x+y)-(2x+1/2y)-(3x+1/6y)-(4x+1/12y)-(5x+1/20y)-.(10x+1/90y) ,其中x=1,y=-2