Question

X+5<4, x€Z
2×x+1>20, c€Z
-3×_< -9,x €Z
4×x_>0, x€Z

Answer 1

Răspuns:

Explicație pas cu pas:

x + 5 < 4

x < 4 - 5

x < -1

___________

2×x + 1 > 20

2×x > 20 - 1

2×x > 19

x > 19/2

_____________

-3x ≤ -9

3x ≥ 9

x  ≥ 9 : 3

x  ≥ 3

______________

4× x ≥  0

x ≥  0 : 4

x ≥  0