Răspuns:
1. 36:3=12 lei pretul unei carti
2. x-11=12=>x=12+11=>x=23
3. x+2 < 7=>x < 7-2=>x < 5 ;x∈(0,1,2,3,4)
4. a·2-4=12=>2a=12+4=>a=16:2=>a=8
5. 2ˣ=(2²)²
2ˣ=2⁴=>x=4
6. x= (-7),7
