Question

Answer 1

5/7 : x = 1/6 - 4/5

5/7 : x = -19/30

x = 5/7 : (-19)/30

x = -150/133

Answer 2

câu này en đăng r mà

Answer 3

5/7 : x = 1/6 - 4/5

=>5/7 : x = -19/30

=>x         = 5/7 : (-19)/30

=>x        = -150/133

Answer 4

\(\dfrac{4}{5}+\dfrac{5}{7}:x=\dfrac{1}{6}\)

\(\Leftrightarrow\dfrac{5}{7}:x=\dfrac{1}{6}-\dfrac{4}{5}\)

\(\Leftrightarrow\dfrac{5}{7}:x=\dfrac{5}{30}-\dfrac{24}{30}\)

\(\Leftrightarrow\dfrac{5}{7}:x=-\dfrac{19}{30}\)

\(\Leftrightarrow x=\dfrac{5}{7}:\dfrac{-19}{30}\)

\(\Leftrightarrow x=\dfrac{5}{7}\times\dfrac{-30}{19}\)

\(\Leftrightarrow x=-\dfrac{150}{135}\)

Answer 5

=-150/133