Question

Bài 1 

a,\(\dfrac{x}{3}\)=\(\dfrac{20}{y}\)=4

b,\(\dfrac{9}{-x}\)=\(\dfrac{y}{5}\)=-3

Mọi người làm chi tiết giúp e với ạ

Answer 1

\(a.\dfrac{12}{3}=\dfrac{20}{5}=4\\ b.\dfrac{9}{-3}=\dfrac{-15}{5}=-3\)

Answer 2

a, Xét \(\dfrac{x}{3}=4\Rightarrow x=12;\dfrac{20}{y}=4\Rightarrow y=\dfrac{20}{4}=5\)

b, \(\dfrac{9}{-x}=-3\Rightarrow-x=-3\Leftrightarrow x=3\)

\(\dfrac{y}{5}=-3\Rightarrow y=-15\)