Question

adevarat sau fals.2x-9=echivalent2x+x=9 b) 12(3+x)=8x echivalent3(3+x)=4x c) 5x+1=x-1echivalent5x-x=0 d) (x+1)(x+2)=2(x+1)echivalentx=2

Answer 1

a) fals
b) fals
c). adv
d).fals

Answer 2

a) 2x-9 ech. 2x+x=9 ( FALS ) b).12(3+x)=8x ech.3(3+x)=4x (F) c).5x+1=x-1echivalent5x-x=0 (A) d). (x+1)(x+2)=2(x+1)echx=2 (F)