Question

Answer 1

\(\Leftrightarrow-12x-28-5x-6\le0\)

\(\Leftrightarrow-17x-34\le0\)

\(\Leftrightarrow-17x\le34\)

\(\Leftrightarrow x\ge\dfrac{-34}{17}\)

\(\Leftrightarrow x\ge-2\)

Answer 2

⇔ -12x + (-28) ≤ 5x + 6

⇔ -12x - 5x ≤ 6 + 28

⇔ -17x ≤ 34

⇔ x ≥ -34/17

Vậy: .....

Answer 3

\(\Leftrightarrow-12x-28-5x-6\le0\)

\(\Leftrightarrow-17x-34\le34\)

\(\Leftrightarrow x\ge\dfrac{-34}{17}\)

\(\Leftrightarrow x\ge-2\)

Vậy: .....