👤

Determinati valoarea lui x daca:
X+2 supra 15=14 supra 5


Răspuns :

(X+2)/15 = 14/5
5(X+2) = 14*15
5X+10 = 210
5X = 200
X = 200:5
X = 40
(x+2)/15=14/5
X/15+2/15=14/5
X/15=14/5-2/15

Dam numitor comun 15 si obtinem
X/15=(14x3-2)/15
X/15=(42-2)/15
X/15=40/15
X=40
Verificare (40+2)/15=14/5
42/15=14/5
Simplu 42/15 cu 3 si obtinem 14/5=14/5