Question

Tìm x biết:

 15:(−100)=−9:(5x)

Đáp số: x=???

 

Answer 1

Ta có: \(15:\left(-100\right)=-9:\left(5x\right)\)

\(\Leftrightarrow\dfrac{-9}{5x}=\dfrac{15}{-100}=\dfrac{-3}{20}\)

\(\Leftrightarrow5x=\dfrac{-9\cdot20}{-3}=60\)

hay x=12

Vậy: x=12

Answer 2

\(\dfrac{15}{-100}=\dfrac{-9}{5x}\\ \Rightarrow75x=900\\ \Rightarrow x=12\)

Vậy x = 12