Question

Làm giúp mình với, mình tick cho... Bài ra lâu rồi không ai làm

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

b) \(x:\dfrac{-3}{5}=\dfrac{-10}{21}\)

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

d) \(\dfrac{1}{2}x+\dfrac{1}{2}=\dfrac{5}{2}\)

Mình hứa tick cho... Hy vọng mọi người giúp mình

Answer 1

a) Ta có :

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

\(x=-2,5\times4\dfrac{1}{3}\)

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

b) Ta có :

\(x:\dfrac{-3}{5}=\dfrac{-10}{21}\)

\(x=\dfrac{-10}{21}\times\dfrac{-3}{5}\)

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

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

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

\(\dfrac{2}{3}x=\dfrac{3}{5}\)

\(x=\dfrac{3}{5}:\dfrac{2}{3}\)

\(x=\dfrac{3}{5}\)

d) \(\dfrac{1}{2}x+\dfrac{1}{2}=\dfrac{5}{2}\)

\(\dfrac{1}{2}x=2\)

\(x=2:\dfrac{1}{2}\)

\(x=4\)

~ Chúc bn học tốt ~

Answer 2

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

\(x:\dfrac{13}{3}=\dfrac{-5}{2}.\)

\(x=\dfrac{-5}{2}.\dfrac{13}{3}.\)

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

b, \(x:\dfrac{-3}{5}=\dfrac{-10}{21}.\)

\(x=\dfrac{-10}{21}.\dfrac{-3}{5}.\)

\(x=\dfrac{30}{105}=\dfrac{2}{7}.\)

c, \(\dfrac{2}{3}x-\dfrac{1}{2}=\dfrac{1}{10}.\)

\(\dfrac{2}{3}x=\dfrac{1}{10}+\dfrac{1}{2}.\)

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

\(\dfrac{2}{3}x=\dfrac{3}{5}.\)

\(x=\dfrac{3}{5}:\dfrac{2}{3}.\)

\(x=\dfrac{3}{5}.\dfrac{3}{2}.\)

\(x=\dfrac{9}{10}.\)

d, \(\dfrac{1}{2}x+\dfrac{1}{2}=\dfrac{5}{2}.\)

\(\dfrac{1}{2}x=\dfrac{5}{2}-\dfrac{1}{2}.\)

\(\dfrac{1}{2}x=2.\)

\(x=2:\dfrac{1}{2}.\)

\(x=2.2.\)

\(x=4.\)

~ Chúc bn học tốt!!! ~

Bài mik đúng thì nhớ tick mik nha!!!