Răspunsuri

2014-10-12T17:44:47+03:00
A+b=33|*3
3a+3b=99 (1)
a+c=11|*2
2a+2c=22 (2)

Adunam relatiile (1) si (2)
3a+3b=99
2a+2c=22
obtinem 5a+3b+2c=121