Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\frac{3}{x}=\frac{y}{35}=\frac{-36}{84}\)
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 !!! ^_^
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 : \(\frac{3}{x}=\frac{-36}{84}=\frac{3}{7}\) => \(x=7\)
\(\frac{y}{35}=\frac{-36}{84}=\frac{3}{7}\)=> \(7y=3\cdot35\)=> \(y=\frac{3\cdot35}{7}=15\)
Ta có: -36/84=-3/7
=> 3/x=y/35=-3/7
3/x=-3/7
=> 3.7=-3.x
=> 21=-3.x
=> 21:(-3)=x
=> x=-7
y/35=-3/7
=> y.7=35.(-3)
=> y.7=-105
=> y =-105:7
=> y =-15
Vậy x=-7;y=-15
Cách nhanh hơn là:-36/84=-3/7
3/x=-3/7 suy ra x=-7
y/35=-3/7suy ra y=-15