Solve the following absolute value inequalities using operations.
\left| 3x+2 \right|≤2
\left | 2x + 4 \right | ≤8
\left | 3x + 4 \right | ≤-2
\left | x + 4 \right | \geq 8
\left | -2x + 6 \right | \geq 12
\left | -2x + 4 \right | \lt 20
\left | 2x + 7 \right | \lt 0