Question

Tìm x:

a) 2/3 x = 5/6.

b) 2x + 2/3 = 5/6.

Answer 1

a) \(\frac{2}{3}x=\frac{5}{6}\)

\(x=\frac{5}{6}:\frac{2}{3}\)

\(x=\frac{5}{4}\)

Vậy \(x=\frac{5}{4}\)

b) \(2x+\frac{2}{3}=\frac{5}{6}\)

\(2x=\frac{5}{6}-\frac{2}{3}\)

\(2x=\frac{1}{6}\)

\(x=\frac{1}{6}:2\)

\(x=\frac{1}{12}\)

Vậy \(x=\frac{1}{12}\)

Answer 2

a) \(\dfrac{2}{3} \)x=\(\dfrac{5}{6}\)

x= \(\dfrac{5}{6} : \dfrac{2}{3}\)

x=\(\dfrac{5}{6}\)x\(\dfrac{3}{2}\)

x=\(\dfrac{5}{4} \)

Vậy x= \(\dfrac{5}{4}\)

b) 2x + \(\dfrac{2}{3} \) =\(\dfrac{5}{6}\)

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

2x =\(\dfrac{5}{6}\)-\(\dfrac{4}{6}\)

2x =\(\dfrac{1}{6}\)

x = \(\dfrac {1}{6} :2\)

x= \(\dfrac{1}{12}\)

Vậy x= \(\dfrac{1}{12}\)

\(\dfrac{1}{12}\)\(\dfrac{1}{12}\)\(\dfrac{1}{12}\)\(\dfrac{1}{6}\)

Answer 3

Câu b cái dưới ghi lộn