Question

[Quỳnh Dayy]

  Giảii hộ

Answer 1

[HT.Phong (9A5)]

a) \(x-\dfrac{3}{7}=-\dfrac{7}{12}\)

\(\Rightarrow x=-\dfrac{7}{12}+\dfrac{3}{7}\)

\(\Rightarrow x=-\dfrac{49}{84}+\dfrac{36}{84}\)

\(\Rightarrow x=-\dfrac{13}{84}\)

b) \(\left(-0,12\right)\left(x-\dfrac{9}{10}\right)=-1,2\)

\(\Rightarrow x-\dfrac{9}{10}=\dfrac{-1,2}{-0,12}\)

\(\Rightarrow x-\dfrac{9}{10}=10\)

\(\Rightarrow x=10+\dfrac{9}{10}\)

\(\Rightarrow x=\dfrac{109}{10}\)