Question

Tìm y, biết:

y \(x\) \(\dfrac{13}{2}\) + 4 = \(\dfrac{11}{2}\)

Answer 1

\(y\times\dfrac{13}{2}+4=\dfrac{11}{2}\\ \Rightarrow y\times\dfrac{13}{2}=\dfrac{11}{2}-4\\ \Rightarrow y\times\dfrac{13}{2}=\dfrac{11-4\times2}{2}\\ \Rightarrow y\times\dfrac{13}{2}=\dfrac{3}{2}\\ \Rightarrow y=\dfrac{3}{2}:\dfrac{13}{2}=\dfrac{3}{2}\times\dfrac{2}{13}=\dfrac{3}{13}\)

Answer 2

ghi rõ hơn đi ạ

 

Answer 3

y×213​+4=211​⇒y×213​=211​−4⇒y×213​=211−4×2​⇒y×213​=23​⇒y=23​:213​=23​×132​=133​
 

Answer 4

y×213​+4=211​⇒y×213​=211​−4⇒y×213​=211−4×2​⇒y×213​=23​⇒y=23​:213​=23​×132​=133​