Question

[Hoàng Châu]

Các bạn giúp mình đc ko

Answer 1

[Đức Hiếu]

a, \(2x-\dfrac{2}{3}-7x=\dfrac{3}{2}-1\)

\(\Rightarrow2x-7x=\dfrac{3}{2}-1+\dfrac{2}{3}\)

\(\Rightarrow-5x=\dfrac{7}{6}\Rightarrow x=\dfrac{7}{6}:\left(-5\right)\Rightarrow x=\dfrac{-7}{30}\)

Vậy \(x=\dfrac{-7}{30}\)

b, \(\dfrac{2}{3}-\dfrac{5}{3}x=\dfrac{7}{10}x+\dfrac{5}{6}\)

\(\Rightarrow-\dfrac{5}{3}x-\dfrac{7}{10}x=\dfrac{5}{6}-\dfrac{2}{3}\)

\(\Rightarrow\dfrac{-71}{30}x=\dfrac{1}{6}\Rightarrow x=\dfrac{-5}{71}\)

Vậy \(x=\dfrac{-5}{71}\)

Answer 2

[Đức Hiếu]

e,\(\dfrac{5}{2}\left(x-\dfrac{3}{5}\right)-\dfrac{1}{10}=x-3\)

\(\Rightarrow\dfrac{5}{2}x-\dfrac{3}{2}-\dfrac{1}{10}=x-3\)

\(\Rightarrow\dfrac{5}{2}x-x=-3+\dfrac{3}{2}-\dfrac{1}{10}\)

\(\Rightarrow\dfrac{3}{2}x=\dfrac{-8}{5}\Rightarrow x=\dfrac{-16}{15}\)

Vậy \(x=\dfrac{-16}{15}\)

f,\(-\dfrac{4}{3}\left(x-\dfrac{1}{4}\right)=\dfrac{3}{2}\left(2x-1\right)\)

\(\Rightarrow-\dfrac{4}{3}x+\dfrac{1}{3}=3x-\dfrac{3}{2}\)

\(\Rightarrow-\dfrac{4}{3}x-3x=-\dfrac{3}{2}-\dfrac{1}{3}\)

\(\Rightarrow\dfrac{-13}{3}x=\dfrac{-11}{6}\Rightarrow x=\dfrac{11}{26}\)

Vậy \(x=\dfrac{11}{26}\)

Chúc bạn học tốt!!!