Răspunsuri

2014-04-14T21:14:15+03:00
 ⇒ \frac{2x-4-5x-5}{10} =3⇒ \frac{-3x-9}{10} =3⇒30=-3x-9⇒39=-3x⇒x=13
 \frac{3x+3-2x+4}{6} =3⇒ \frac{x+7}{6} =3⇒x+7=18⇒x=11

2014-04-14T21:40:31+03:00
1)x-2/5 -x+1/2=3  aducem la acelasi numitor (10)
2x-4-5x-5=30
-3x-9=30
-3x=30+9
-3x=39
x=-13

2)x+1/2 -  x-2/3=3 aducem la acelasi numitor (6)
3x+3-2x+4=18
x+7=18
x=18-7
x=11