Question

desigualdad dada expresar la notacion de intervalos... Aiudaaa!!​

Answer 1

13.

3x < -9

3x ÷ 3 < -9 ÷ 3

x < -3

15.

4x + 1 > 19

4x > 10 - 1

4x > 9

$x > \frac{9}{14}$

17.

4x > 5x -7

4x - 5x > -7

-x > -7

x < 7

19.

-4 < 1 -x < 3

1 - x > -4

1 - x < 3

x < 5

x > 2

x ∈ [-2, 5⟩

21.

x < 3x + 2 < x + 6

3x + 2 > x

3x + 2 < x + 6

x > -1

x < 2

x ∈ [-1,2⟩

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