Question

tìm x, biết:

-9/x= -3/4/49

làm giúp mình nhé!

Answer 1

\(\dfrac{-9}{x}=\dfrac{-3}{\dfrac{4}{49}}\)

<=> \(\dfrac{-9}{x}=\dfrac{-147}{4}\)

<=> \(-9\cdot4=-147\cdot x\)

<=> \(-36=-147\cdot x\)

\(x=\dfrac{-36}{-147}=\dfrac{36}{147}\)

Answer 2

\(\dfrac{-9}{x}=\dfrac{\dfrac{-3}{4}}{49}\)

\(\Leftrightarrow\dfrac{-9}{x}=\dfrac{-3}{196}\)

\(\Leftrightarrow x.\left(-3\right)=\left(-9\right).196\)

\(\Leftrightarrow x.\left(-3\right)=-1764\)

\(\Leftrightarrow x=\left(-1764\right):\left(-3\right)\)

\(\Leftrightarrow x=588\)

Vậy \(x=588\)