Răspunsuri

2014-02-08T14:59:44+02:00
(x-3,1)=15/8 :5/4
(x-3,1)=15/8 * 4/5 ..se simplifica si devin 3/2
(x-3,1)=3/2 care este amplificat cu 9 - (transformam in fractie ordinara 3,1 (2/9) 
x=27/18-4/18
x=23/18
2014-02-08T15:00:07+02:00
4(x-3)=15/8
4x-12=15/8
4x=15/8+12
4x=1.8+12
4x=13.8
x= 13.8 /4
x=3.4