Question

Rezolvati, in multime numerelor naturale, inecuatiile:
1. 3x+5<3(x+2)
2. 4x+7>2(2x+5)
3. 7x+41>2(3x+11)
4. 18+10x<5(x+2)+2(x+3)
Repde va rog!! +coroana!!

Answer 1

1) 3x+5<3(x+2)

3x+5<3x+6

5<6

2) 4x+7>2(2x+5)

4x+7>4x+10

7>10 fals

3) 7x+41>2(3x+11)

7x+41>6x+22

7x-6x>22-41

x>-19

4) 18+10x<5(x+2)+2(x+3)

18+10x<5x+10+2x+6

10x-7x<16-18

3x<-2

x<-2/3