Question

Bài 1:Tìm x biết:

a,(3\(\dfrac{3}{13}\) - 2\(\dfrac{1}{13}\)) : x - 2\(\dfrac{1}{2}\) : \(\dfrac{3}{4}\) = 5\(\dfrac{2}{3}\)

b,3\(\dfrac{1}{4}\) . x - 1\(\dfrac{1}{6}\) . x - 1\(\dfrac{2}{3}\) = \(\dfrac{5}{12}\)

Answer 1

a) (3 3/13 - 2 1/13) : x - 2 1/2 : 3/4 = 5 2/3

(3 - 2 + 3/13 - 1/13) : x - 5/2 : 3/4 = 17/3

15/13 : x - 10/3 = 17/3

15/13 : x = 17/3 + 10/3

15/13 : x = 9

x = 15/13 : 9

x = 5/39

b) 3 1/4 . x - 1 1/6 . x - 1 2/3 = 5/12

13/3 . x - 7/6 . x - 5/3 = 5/12

x.(13/3 - 7/6) = 5/12 + 5/3

x . 19/6 = 25/12

x = 25/12 : 19/6

x = 25/38