Question

 giải giúp ạ mik với ạ . em đang cần gấp. 

Answer 1

Câu 5:

\(\dfrac{13}{6}+x=-2,4\)

\(\Rightarrow\dfrac{13}{6}+x=-\dfrac{12}{5}\)

\(\Rightarrow x=-\dfrac{12}{5}-\dfrac{13}{6}\)

\(\Rightarrow x=-\dfrac{137}{30}\) 

Câu 6:

\(3,7-x=\dfrac{7}{10}\)

\(\Rightarrow\dfrac{37}{10}-x=\dfrac{7}{10}\)

\(\Rightarrow x=\dfrac{37}{10}-\dfrac{7}{10}\)

\(\Rightarrow x=3\)

Câu 7:

\(\dfrac{3}{7}+x=\dfrac{2}{14}\)

\(\Rightarrow\dfrac{3}{7}+x=\dfrac{1}{7}\)

\(\Rightarrow x=\dfrac{1}{7}-\dfrac{3}{7}\)

\(\Rightarrow x=-\dfrac{2}{7}\)

Câu 8:

\(\dfrac{3}{7}\cdot y=\dfrac{-2}{5}\)

\(\Rightarrow y=\dfrac{-2}{5}:\dfrac{3}{7}\)

\(\Rightarrow y=\dfrac{-2}{5}\cdot\dfrac{7}{3}\)

\(\Rightarrow y=-\dfrac{14}{15}\)