Question

mb cho mk hỏi câu này nhé!tìm x,y đó

3x/5=-6/y=-30/50

Answer 1

\(\frac{3x}{5}=\frac{-30}{50}\)

\(\Rightarrow\frac{3x}{5}=\frac{-3}{5}\)

\(\Rightarrow3x.5=\left(-3\right).5\)

\(\Rightarrow15x=\left(-15\right)\)

\(\Rightarrow x=\left(-15\right):15=-1\)

\(\frac{-6}{y}=\frac{-30}{50}\)

\(\Rightarrow\frac{-6}{y}=\frac{-3}{5}\)

\(\Rightarrow\left(-6\right).5=-3y\)

\(\Rightarrow\left(-30\right)=-3y\)

\(\Rightarrow y=\left(-30\right):\left(-3\right)=10\)

Vậy x = -1; y = 10

 

Answer 2

\(\frac{3x}{5}=\frac{-6}{y}=\frac{-30}{50}\)

rút gọn:\(\frac{-30}{50}=\frac{-3}{5}\)

ta có:\(\frac{3x}{5}=\frac{-3}{5}\)=>3x.5=-15

                                     15x=-15=>x=-1

\(\frac{-6}{y}=\frac{-3}{5}\)=>-30=-3y

                              10=y

vậy x=-1, y=10

Answer 3

\(\frac{3x}{5}=\frac{-6}{y}=\frac{-30}{50}\)

\(\Rightarrow\frac{3x}{5}=\frac{-6}{y}=\frac{-3}{5}\)

+)\(\frac{3x}{5}=\frac{-3}{5}\)

\(\Rightarrow\)3x*5=-15\(\Rightarrow\)3x=-3\(\Rightarrow\)x=-1

+)\(\frac{-6}{y}=\frac{-3}{5}\)

\(\Rightarrow\)-3y=-30\(\Rightarrow\)y=10

Vậy x= -1 và y=10