Question

\(\dfrac{-7}{x}\)+\(\dfrac{8}{15}\)=\(\dfrac{-1}{20}\) Tìm x

Answer 1

\(-\dfrac{7}{x}+\dfrac{8}{15}\) = \(\dfrac{-1}{20}\)

\(\dfrac{7}{x}\) = \(\dfrac{8}{15}\) + \(\dfrac{1}{20}\)

\(\dfrac{7}{x}\) = \(\dfrac{7}{12}\)

\(x\) = 7 : \(\dfrac{7}{12}\)

\(x\) = 12