Răspuns:
(539+318)-[651-(258+214)+654]-13=12
(539+318)-(651-472+654)-13=12
857 -(179 +654)-13=12
857 - 833 -13=12
25 - 13=12
Explicație pas cu pas:
(529+318)-[651-(258+214)+654]-13=
857-(651-472+654)-13=
857-(179+654)-13
857-833-13=
24-13=11
