Question

\(\dfrac{7}{10}\)\(+\)\(\dfrac{-13}{5}\) với \(\dfrac{a}{20}\) vậy a băn mấy

Answer 1

\(\dfrac{7}{10}+\dfrac{-13}{5}=\dfrac{a}{20}\)

\(\Rightarrow\dfrac{14}{20}+\dfrac{-52}{20}=\dfrac{a}{20}\)

\(\Rightarrow\dfrac{-38}{20}=\dfrac{a}{20}\)

Vậy \(a=-38\)

Answer 2

đề bài đâu chẳng hiểu hết

Answer 3

\(\dfrac{7}{10}+\dfrac{-13}{5}=\dfrac{a}{20}\)

\(\Rightarrow\dfrac{14}{20}+\dfrac{-52}{20}=\dfrac{a}{20}\)

\(\Rightarrow\dfrac{-38}{20}=\dfrac{a}{20}\)

\(\Rightarrow a=-38\)

Vậy \(a=-38\)

Answer 4

vô lí !