Question

Реши уравнение. 
6 2/13-х=3 7/13
х=?

Answer 1

6 2/13-х=3 7/13
x= 6 2/13- 3 7/13
x= 2 8/13

!!!!!!!!   6 2/13- 3 7/13= 3 (2-7)/13= 2 (15-7)/13= 2 8/13   !!!!!!!!!!!!!