Răspunsuri

2014-03-20T17:13:40+02:00
11(X+2)+3(X-5)=7(2X+1)
11x+22+3x-15=14x+7
11x+3x+7=14x+7
14x+7=14x+7
Egalitatea este adevarata oricare ar fi x apartine R
2014-03-20T17:15:05+02:00