Question

tìm các số nguyên x;y thoả mãn -3/4=x/20=21/y

Answer 1

\(\dfrac{-3}{4}=\dfrac{x}{20}\Rightarrow x=\dfrac{-3}{4}.20\Rightarrow x=-15\)

\(-\dfrac{3}{4}=\dfrac{21}{y}\Rightarrow y=21:\left(-\dfrac{3}{4}\right)\Rightarrow y=-28\)

Answer 2

\(\dfrac{-3}{4}\)=\(\dfrac{X}{20}\)⇒x=\(\dfrac{-3}{4}\).20⇒x=\(-15\)

\(\dfrac{-3}{4}\)=\(\dfrac{21}{y}\)⇒y=21:\(\left(-\dfrac{3}{4}\right)\)⇒\(y\)=\(-28\)