Răspuns :
a+b+c+d = 1026
a+b = 549
a+b+c = 911
b + c + d = 796
549 +c =911 c = 362
911 + d = 1026 d = 115
b + 362 + 115 = 796 b = 319
a+ 319 = 549 a = 230
a+b = 549
a+b+c = 911
b + c + d = 796
549 +c =911 c = 362
911 + d = 1026 d = 115
b + 362 + 115 = 796 b = 319
a+ 319 = 549 a = 230
a+b+c+d=1026;
⇒a+b=549;
⇒a+b+c=911;
⇒b+c=796;
⇒d=1026-911
⇒d=115;
⇒a=911-796
⇒a=115;
⇒b=549-115
⇒b=434;
⇒c=796-434
⇒c=362;
⇒a+b=549;
⇒a+b+c=911;
⇒b+c=796;
⇒d=1026-911
⇒d=115;
⇒a=911-796
⇒a=115;
⇒b=549-115
⇒b=434;
⇒c=796-434
⇒c=362;