Răspuns:
a) x + 1232 - 679 = 6897 / +679
x + 1232 = 7576 / - 1232
x = 6344
b) x + 1452 - 65 = 4356 / + 65
x + 1452 = 4421 / - 1452
x = 2969
c) x - 987 - 1078 = 8706 / + 1078
x - 987 = 9784 / + 987
x = 10771
d) x - 2367 + 3207 = 6006 / - 3207
x - 2367 = 2799 / + 2367
x = 5166