Question

tìm x biết

a ) 0,5 . x - \(\dfrac{2}{3}\).x =\(\dfrac{7}{12}\)

b ) x : \(4\dfrac{1}{3}\)= -2,5

Answer 1

a, (0.5-\(\dfrac{2}{3}\))x=\(\dfrac{7}{12}\)

\(\Leftrightarrow\)\(\dfrac{-1}{6}\)x=\(\dfrac{7}{12}\)

\(\Leftrightarrow\)x= \(\dfrac{-7}{2}\)=-3,5

b.x \(\div\)4\(\dfrac{1}{3}\)=-2,5

\(\Leftrightarrow\) x \(\div\)\(\dfrac{13}{3}\)=-2,5

\(\Leftrightarrow\) x = -2,5 \(\times\)\(\dfrac{13}{3}\)

\(\Leftrightarrow\) x = \(\dfrac{-65}{6}\)

Answer 2

x.(0.5-\(\dfrac{2}{3}\))=\(\dfrac{7}{12}\)

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

Answer 3

x = \(\dfrac{-65}{6}\)