5x=y,5:y=x,3x=4y,3:x=4:y,3;x=y:4,3x+4x=y,3x+4=y y和x成比例吗为什么
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5x=y,5:y=x,3x=4y,3:x=4:y,3;x=y:4,3x+4x=y,3x+4=y y和x成比例吗为什么
5x=y,5:y=x,3x=4y,3:x=4:y,3;x=y:4,3x+4x=y,3x+4=y y和x成比例吗
为什么
5x=y,5:y=x,3x=4y,3:x=4:y,3;x=y:4,3x+4x=y,3x+4=y y和x成比例吗为什么
5x=y,5:y=x,3x=4y,3:x=4:y,3;x=y:4 3x+4x=y,中X和Y成比例
分别成正比 反比 正比 正比 反比 正比
3x+4x=y 确定没抄错?要是抄错了 就不成比例了
因为Y比X得一个常数才能叫成比例,在这基础上 Y随着X的增大而增大叫正比 反之成反比
(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
(5x+3y)(3y-5x)-(4x-y)(4y+x)=
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/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y) x=4 y=5
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=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)/(x+y)=3求( 3x-2y-1)/(x+y-5)
已知x/5=y/3,则(x/x+y)+(y/x-y)-(yxy/xxx-yxy)
3X=5Y (X+Y)*3X=(2Y+X)*4+2*2
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
5x-4y(y-x)=?
{(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=?