Răspuns:
Explicație pas cu pas:
6+84×4:(21×4-12×28:n+5×8):3=8
84×4:(21×4-12×28:n+5×8):3 = 8 - 6 = 2
84×4:(21×4-12×28:n+5×8) = 2×3 = 6
336 : (21×4-12×28:n+5×8) = 6
(21×4-12×28:n+5×8) = 336 : 6 = 56
84 - 336 : n + 40 = 56
84+ 40 - 56 = 336 : n
68 = 336 : n
n = 336 : 68 = 168/34= 84/17
