Răspuns :
3x+(4/5)*x=9/12
Aducem la acelasi numitor(60=5*12)
180x+48x=45
228x=45 => x=45/228=15/76
Aducem la acelasi numitor(60=5*12)
180x+48x=45
228x=45 => x=45/228=15/76
3 × a + 4a/5 = 9/12 |×60
180 × a + 12×4×a = 9 ×5
180 × a + 48 ×a = 45
228 × a = 45 | : 3
76 × a = 15
a = 15/76 (numarul cautat)
180 × a + 12×4×a = 9 ×5
180 × a + 48 ×a = 45
228 × a = 45 | : 3
76 × a = 15
a = 15/76 (numarul cautat)