Răspuns :
4536-812-3215=509 3786-[606+927]+1250=3503 3786-1533+1250=3503 [ 7873-515]-[5784-515]=1059
a) n-3.215= 509; n= 509+3.215 n=3724; 4.536-x=3724; x=4.536-3724; x = 812
b) 3786- n + 1250 = 3503; 3786+1250-3503 = n; n=1533; x+927 = 1533; x= 1533-927; x= 606
b) 3786- n + 1250 = 3503; 3786+1250-3503 = n; n=1533; x+927 = 1533; x= 1533-927; x= 606