Question

Tìm x:

a. x + 4/7 = 38/21

b. x - 1/3 = 7/45 : 2/15

Giải chi tiết giúp mik!

Answer 1

a.\(x+\dfrac{4}{7}=\dfrac{38}{21}\)

\(x=\dfrac{38}{21}-\dfrac{4}{7}\)

\(x=\dfrac{38}{21}-\dfrac{12}{21}=\dfrac{26}{21}\)

b.\(x-\dfrac{1}{3}=\dfrac{7}{45}:\dfrac{2}{15}\)

\(x-\dfrac{1}{3}=\dfrac{7}{6}\)

\(x=\dfrac{7}{6}+\dfrac{1}{3}\)

\(x=\dfrac{7}{6}+\dfrac{2}{6}=\dfrac{9}{6}\)

Answer 2

x = 38/21 - 4/7

x = 26/21

 

x - 1/3 = 7/6

x = 7/6 + 1/3

x = 3/2