Question

tim x,biết :7/2:|2x-1|=21/22

Answer 1

=> |2x - 1| = 11/2

Tìm 2 TH thôi 

Answer 2

7/3 hay sao ấy

ko chắc lắm, mik mới hoc lớp 6 thui à

Answer 3

7/2 : l2x-1l = 21/22

l2x-1l = 7/2 : 21/22 = 7/2 . 22/21 = 11/3

=> 2x-1 = ±11/3

TH1:  2x-1 = -11/3                                              TH2:  2x-1 = 11/3

         2x = -11/3 + 1 = -11/3 + 3/3 = -8/3                       2x = 11/3 + 1 = 11/3 + 3/3 = 14/3

Vậy x\(\in\left\{\frac{-8}{3};\frac{14}{3}\right\}\)