Răspuns:
Explicație:
542 + a ≤ 529
a ≤ 529 - 542
a ≤ -13
_____________
879 - a > 873
a < 879 - 873
a < 6
______________
a + 435 ≤ 439
a ≤ 439 - 435
a ≤ 4
________________
a + 613 < 617
a < 617 - 613
a < 4
_________________
712 + a < 718
a < 718 - 712
a < 6
_______________
967 - a ≥ 962
a ≤ 967 - 962
a ≤ 5
________________
876 - a > 872
a < 876 - 872
a < 4
______________
769 - a ≥ 764
a ≤ 769 - 764
a ≤ 5