\(\frac{2015}{2014}\)

X/y=2015/2014

\(\frac{x}{y}=\frac{2015}{2014}\)

=>(x-2015).2014 = (y-2014).2015

=>2014x - 2014.2015 =2015y-2014.2015

=>2014x=2015y

=>\(\frac{x}{y}=\frac{2015}{2014}\)

\(\frac{x}{y}=\frac{2015}{2014}\)

tick mình nhé !

Théo đề ta có (x-2015)/2015=(y-2014)/2014=x/2015-1=y/2014-1

--> x/2015=y/2014

-->x/y=2015/2014 

tick nha

\(\frac{x-2015}{2015}=\frac{y-2014}{2014}\Leftrightarrow\frac{x}{2015}-\frac{2015}{2015}=\frac{y}{2014}-\frac{2014}{2014}\Leftrightarrow\frac{x}{2015}-1=\frac{y}{2014}-1\)

\(\Leftrightarrow\frac{x}{2015}=\frac{y}{2014}\)

suy ra \(\frac{x}{y}=\frac{2015}{2014}\)

mjh lm trc lik e 

2015/2014

\(\frac{2015}{2014}\)

\(\frac{2015}{2014}\)

\(\frac{x-2015}{2015}=\frac{x-2014}{2014}\Rightarrow x-\left(2015\cdot2014\right)=y-\left(2015\cdot2014\right)\)=\(x-4058210=y-4058210\)do tích trung tỉ = tích ngoại tỉ ta có:

\(2014x\cdot4058201=2015y\cdot4058201\)=\(\frac{2014x}{2015y}=\frac{4058201}{4058201}=1\Rightarrow\frac{x}{y}\cdot\frac{2014}{2015}=1\Rightarrow\frac{x}{y}=\frac{1}{\frac{2014}{2015}}=1\cdot\frac{2015}{2014}=\frac{2015}{2014}\)

Ta có : \(\dfrac{x}{2013}=\dfrac{y}{2014}=\dfrac{z}{2015}\)

Suy ra \(\dfrac{x}{2013}=\dfrac{y}{2014}=\dfrac{z}{2015}=\dfrac{x-y}{2013-2014}=\dfrac{x-y}{-1}\)