👤

5x+4=25-2x rezolvati in multimea R

Răspuns :

5x+4=25-2x
5x+2x=25-4;   7x=21;  x=21/7;  x=3, x apartine lui R
5x+4=25-2x
5x+2x=25-4
7x=21
x=3