Question

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

b) ( \(2\dfrac{4}{5}\)x - 50 ) : \(\dfrac{2}{3}\)= 51

c) \(\dfrac{2}{3}\)x - \(\dfrac{1}{2}\)x = \(\dfrac{5}{12}\)

d) \(\dfrac{17}{2}\)- | 2x - \(\dfrac{3}{4}\)| = \(-\dfrac{7}{4}\)

đ) ( x + \(\dfrac{1}{5}\))² + \(\dfrac{17}{25}\)= \(\dfrac{26}{25}\)

Answer 1

a: =>2/3x=1/10+1/2=1/10+5/10=6/10=3/5

=>x=3/5:2/3=3/5x3/2=9/10

b: \(\Leftrightarrow x\cdot2.8-50=34\)

=>2,8x=84

=>x=30

c: \(\Leftrightarrow\dfrac{1}{6}x=\dfrac{5}{12}\)

hay x=5/2

d: \(\Leftrightarrow\left|2x-\dfrac{3}{4}\right|=\dfrac{17}{2}+\dfrac{7}{4}=\dfrac{41}{4}\)

=>2x-3/4=41/4 hoặc 2x-3/4=-41/4

=>2x=44/4=11 hoặc 2x=-19/2

=>x=11/2 hoặc x=-19/4