Răspunsuri

2014-09-02T17:55:41+03:00
2,5(x-4)-6x=3-x
2,5x-10-6x=3-x 
2,5x-6x+x=3+10
-2,5x=13
x= 13: (-2,5)
x=130:(-25)
x= -5,2 (numar rational)

negativ
nu ar trebui sa fie asa
Dar ai dreptate
E rational
F%€k
2014-09-02T18:06:32+03:00
Asa cum a raspuns si Razvan:
2,5(x-4)-6x=3-x
2,5x-10-6x=3-x
-10-3=-x-2,5x+6x
-13=2,5x
x*25/10=-13
x=-13*10/25
x=-13*2/5
x=-26/5
x=-5,2 nu apartine numerelor rationale,x nr irational
2 3 2