Question

Tim x va y

a, \(\dfrac{x}{4}=\dfrac{y}{y}\)va \(x+y=180\)

b, \(5x=3y\) va \(x-y=-5\)

Ai lam dung mik tik cho

Answer 1

a. Sai đề.

b. \(5x=3y\Rightarrow\dfrac{x}{3}=\dfrac{y}{5}\)

Áp dụng tính chất dãy tỉ số bằng nhau, ta có:

\(\dfrac{x}{3}=\dfrac{y}{5}=\dfrac{x-y}{3-5}=\dfrac{5}{2}\)

\(\Rightarrow\left\{{}\begin{matrix}x=\dfrac{3.5}{2}=\dfrac{15}{2}\\y=\dfrac{5.5}{2}=\dfrac{25}{2}\end{matrix}\right.\)

Vậy ...

Answer 2

a, Sai đề ko vậy

b, \(5x=3y\Rightarrow\dfrac{x}{3}=\dfrac{y}{5}\)

Áp dụng tính chất dãy tỉ số bằng nhau ta có:

\(\dfrac{x}{3}=\dfrac{y}{5}=\dfrac{x-y}{3-5}=\dfrac{-5}{-2}=\dfrac{5}{2}\)

\(\Rightarrow x=\dfrac{5}{2}.3=\dfrac{15}{2}\)

\(y=\dfrac{5}{2}.5=\dfrac{25}{2}\)