Question

x+5<8
6+x<10
18+x<21
3x-2>4
8x<16
5x+6<31
9x<36
2x<11
7x>14
x-4>8
x+3<6
2x+6<30
4x+8<16

Answer 1

daca x apartine lui N
X+5<8x<8-5
x<3
x=0,1,2


6+x<10
x<10-6
x<4
x=0,1,2,3

18+x<21
x<21-18
x<3
x=0,1,2

3x-2>4
3x>4+2
3x>6
x>6:2
x>3
x=4,5,6.....


8x<16
x<16:8
x<2
x=0,1

5x+6<31
5x<31-6
5x<25
x<25:5
x<5
x=0,1,2,3,4


9x<36
x<36:9
x<4
x=0,1,2,3

2x<11
x<11:2
x<5,5
x=0,1,2,3,4


7x>14
x>14:7
x>2
x=3,4,5,6...

x-4>8
x>8+4
x>12
x=13,14,15,16,17,.....

x+3<6
x<6-3
x<3
x=0,1,2

2x+6<30
2x<30-6
2x<24
x<12
x=0,1,2,3,4,5,6,7,8,9,10,11

4x+8<16
4x<16-8
4x<8
x<2
x=0,1,