Реши уравнения. (5 376-а)- 877=904 (k-7 756)-12 000=4 896 4 284-(с-378)=1 287

1)5376-a-877 = 904
4499 - a = 904
a = 3595
2)k-7756-12000 = 4896
-19756 + k = 4896
k = 24652
3)4284-c+378 = 1287
4662 - c = 1287
c = 3375