Question

[Là la]

x - 8/15 = 11/3

3/2 . x + 7/3 = 5/4

7/8 - x = -4/5 : 3/10 

Answer 1

[Nguyễn Huy Tú]

\(x-\dfrac{8}{15}=\dfrac{11}{3}\Leftrightarrow x=\dfrac{11}{3}+\dfrac{8}{15}=\dfrac{21}{5}\)

\(\dfrac{3x}{2}+\dfrac{7}{3}=\dfrac{5}{4}\Leftrightarrow\dfrac{3x}{2}=\dfrac{5}{4}-\dfrac{7}{3}=-\dfrac{13}{12}\Leftrightarrow x=-\dfrac{13}{12}:\dfrac{3}{2}=-\dfrac{13}{18}\)

\(\dfrac{7}{8}-x=-\dfrac{4}{5}:\dfrac{3}{10}=-\dfrac{8}{3}\Leftrightarrow x=\dfrac{7}{8}+\dfrac{8}{3}=\dfrac{85}{24}\)

Answer 2

[HT.Phong (9A5)]

\(x-\dfrac{8}{15}=\dfrac{11}{3}\\ x=\dfrac{8}{15}+\dfrac{11}{3}\\ x=\dfrac{8}{15}+\dfrac{55}{15}\\ x=\dfrac{63}{15}\)

___________

\(\dfrac{3}{2}x+\dfrac{7}{3}=\dfrac{5}{4}\\ \dfrac{3}{2}x=\dfrac{5}{4}-\dfrac{7}{3}\\ \dfrac{3}{2}x=\dfrac{-13}{12}\\ x=\dfrac{-13}{12}:\dfrac{3}{2}\\ x=\dfrac{-13}{18}\)

____________

\(\dfrac{7}{8}-x=-\dfrac{4}{5}:\dfrac{3}{10}\\ \dfrac{7}{8}-x=\dfrac{-8}{3}\\ x=\dfrac{7}{8}+\dfrac{8}{3}\\ x=\dfrac{85}{24}\)