Răspuns:
-2t+9=2t+5 <=>
-4t=-4 =>
t=1
Răspuns: t=1
-2t+9=2t+5 |-5
-2t+4=2t |+2t
4=4t => t=4/4 => t=1
Verificare :
-2*1 + 9 = 2*1+5
-2+9=2+5
7=7
