Răspunsuri

2014-11-13T18:19:19+02:00
A + b = 3(a - b)
a + b = (a - b) + 25 428
a - a + b + b = 25 428
2b = 25 428
b = 25 428 : 2
b = 12 714
a + b - 3a - 3b = 0
- 2a - 2b = 0
- 2a - 2 * 12714 = 0
- 2a = 25 428
a = - 25 428 : 2
a = - 12 714