Question

Determine os valores reais de x em

Answer 1

x + 2 - 15 ≤ 5x
x - 5x ≤ 13
-4x ≤ 13
4x ≥ -13
x ≥ -13/4

2x + 2 - x > 2x - 8
2x - x - 2x  > -8 - 2
-x > -10
x < 10

2(x - 2) + 6x ≥ 3(3x - 3)
2x - 4 + 6x ≥ 9x - 9
2x + 6x - 9x ≥ -9 + 4
-x ≥ -5
x ≤ 5