đề gì mà củ chuối thế

\(\frac{3}{x}=\frac{y}{35}=\frac{-36}{84}\)

Ta có:\(\frac{y}{35}=\frac{-36}{84}\)

\(\Rightarrow y.84=-36.35\)

\(\Rightarrow y.84=-1260\)

\(\Rightarrow y=-1260:84\)

\(\Rightarrow y=-15\)

\(\Rightarrow\frac{3}{x}=\frac{-15}{35}\)

\(\Rightarrow3.35=-15x\)

\(\Rightarrow105=-15x\)

\(\Rightarrow x=-7\)

Vậy x=-7;y=-15 để .....

\(\frac{3}{x}=\frac{y}{35}=\frac{-36}{84}\)

ta rút gọn phân số : \(\frac{-36}{84}=\frac{-3}{7}\)

ta có : \(\frac{3}{x}=\frac{y}{35}=\frac{-3}{7}\)

\(\frac{3}{x}=\frac{-3}{7}\Rightarrow x=\frac{3.7}{\left(-3\right)}=-7\)

\(\frac{y}{35}=\frac{-3}{7}\Rightarrow y=\frac{35.\left(-3\right)}{7}=-15\)

                   \(\frac{3}{x}=\frac{y}{35}=\frac{-36}{84}\)

                \(\Rightarrow\frac{3}{x}=\frac{y}{35}=\frac{-3}{7}\)

           Ta có : \(\frac{3}{x}=\frac{y}{35}=\frac{-3}{7}\)

               \(\frac{3}{x}=\frac{-3}{7}\)

               \(\Rightarrow x=\frac{3.7}{-3}=-7\)

                \(\frac{y}{35}=\frac{-3}{7}\Rightarrow y=\frac{-3.35}{7}=-15\)

              Ủng hộ mk nha !!! ^_^

\(\frac{3}{x}=\frac{y}{35}=-\frac{36}{84}\)
Ta có: \(-\frac{36}{84}=-\frac{3}{7}\)
\(\frac{3}{x}=\frac{y}{35}=-\frac{3}{7}\)
\(\frac{3}{x}=\frac{-3}{7}\Rightarrow x=\frac{3\times7}{\left(-3\right)}=-7\)
\(\frac{y}{35}=\frac{-3}{7}\Rightarrow y=\frac{35\times\left(-3\right)}{7}=-15\)
Vậy, \(x=-7\)\(;\)\(y=-15\)

Ta có: \(\frac{3}{x}=\frac{y}{35}=\frac{\left(-36\right)}{84}\)

\(\left(-36\right).35=y.84\Leftrightarrow\left(-1260\right)=y.84\)

\(\Rightarrow y=\left(-15\right)\)

\(\Leftrightarrow3.35=x.\left(-15\right)\)

\(\Leftrightarrow105=x.\left(-15\right)\Rightarrow x=\left(-7\right)\)

\(\Rightarrow\orbr{\begin{cases}x=\left(-7\right)\\y=\left(-15\right)\end{cases}}\)

\(\frac{3}{x}=\frac{y}{35}=\frac{-36}{84}\)

xét : \(\frac{3}{x}=\frac{-36}{84}\)

\(\Rightarrow\) \(3\cdot84=-36\cdot x\)

\(\Rightarrow\) \(252=-36\cdot x\)

\(\Rightarrow\) \(252:\left(-36\right)=x\)

\(\Rightarrow\) \(-7=x\)

thay vào x ta có:

\(\frac{3}{-7}=\frac{y}{35}=\frac{-36}{84}\)

xét \(\frac{3}{-7}=\frac{y}{35}\)

\(\Rightarrow\) \(3\cdot35=-7\cdot y\)

\(\Rightarrow\) \(105=-7\cdot y\)

\(\Rightarrow\) \(105:\left(-7\right)=y\)

\(\Rightarrow\) \(-15=y\)

vậy x = 3 ; y = -15

Áp dụng công thức : \(\frac{a}{b}=\frac{c}{d}\Leftrightarrow a\times d=b\times c\)

Để \(\frac{y}{35}=\frac{-36}{84}\Leftrightarrow y\times84=35\times\left(-36\right)\)

\(\Leftrightarrow y\times84=-1260\)

\(\Leftrightarrow y=-1260:84\)

\(\Leftrightarrow y=-15\)

Để \(\frac{3}{x}=\frac{y}{35}\Rightarrow\frac{3}{x}=\frac{-15}{35}\)

\(\Rightarrow x\times\left(-15\right)=35\times3\)

\(\Rightarrow x\times\left(-15\right)=105\)

\(\Rightarrow x=105:\left(-15\right)\)

\(\Rightarrow x=-7\)

Vậy x = -7 ; y = -15

\(\frac{3}{x}\)=  \(\frac{-36}{84}\)

  3 . 84 = x . (-36)

  252 = x . (-36)

   x = 252 : (-36)

  x = -7

  \(\frac{y}{35}\)=   \(\frac{-36}{84}\)

   y . 84 = 35 . (-36)

   y . 84 = -1260

   y = -1260 :84

   y = -15

          Vậy x = -7

                 y = -15

Ta có : \(\frac{3}{x}=\frac{-36}{84}=\frac{3}{7}\) => \(x=7\)

  \(\frac{y}{35}=\frac{-36}{84}=\frac{3}{7}\)=> \(7y=3\cdot35\)=> \(y=\frac{3\cdot35}{7}=15\)

\(y=\frac{-36\times35}{84}=-15\)

\(x=\frac{35\times3}{-15}=-7\)

Vậy................

x= -7

y= -15