x△y=2x/y,要使□△(x△2)=6中的x值是5,□里应填什么数?
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![x△y=2x/y,要使□△(x△2)=6中的x值是5,□里应填什么数?](/uploads/image/z/4356195-51-5.jpg?t=x%E2%96%B3y%3D2x%2Fy%2C%E8%A6%81%E4%BD%BF%E2%96%A1%E2%96%B3%28x%E2%96%B32%29%3D6%E4%B8%AD%E7%9A%84x%E5%80%BC%E6%98%AF5%2C%E2%96%A1%E9%87%8C%E5%BA%94%E5%A1%AB%E4%BB%80%E4%B9%88%E6%95%B0%3F)
x△y=2x/y,要使□△(x△2)=6中的x值是5,□里应填什么数?
x△y=2x/y,要使□△(x△2)=6中的x值是5,□里应填什么数?
x△y=2x/y,要使□△(x△2)=6中的x值是5,□里应填什么数?
□△(x△2)=6,□△(5△2)=6,
□△(2*5/2)=6,
□△5=6,
2□/5=6,
□=15,
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
(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
[(2x-y)(2x+y)+y(y-6x)]÷2x=?
x△y=2x/y,要使□△(x△2)=6中的x值是5,□里应填什么数?
2(x+y)-3(x-y)=1 6(x+y)+(x-y)=51
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
{6(x-y)-7(x+y)=21 {2(x-y)-5(x+y)=-1
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
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
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
x,y 满足x(x-2)-y(y-6)=-10,求x,y的值
对于x,y定义两种运算“*”“△”如下:x*y=6x+5y,x△y=3xy,求(2*3)△4
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