Question

(6,5-1,3х)*4/13=(0,8-3):6/7

Answer 1

(6,5-1,3х)*4/13=(0,8-3):6/7; 1,3 (5-x)*4/13 = -2,2:6/7; 4(5-x)/10 = -2,2:6/7; 4(5-x) = 10*(-2,2):6/7; 20-4x = -22:6/7; 6(20-4x) = -22*7; 120-24x = -154; 24x = 120+154; 24x = 274; x = 11+5/12

Ответ: 11+5/12.  

Answer 2

(6,5 - 1,3Х) * 4/13 = (0,8-3) : 6/7
Решение во вложении: