$\"\"$

The inequality is $\"\"$ .

Multiply each side by 3.

$\"\"$

$\"\"$ .

For any real numbers a and b, where $\"\"$ , if $\"\"$ , then $\"\"$ .

From the inequality $\"\"$ , the value of $\"\"$ .

Therefore the inequality has no solution or $\"\"$ . $\"\"$

The absolute value inequality $\"\"$ is equivalent to $\"\"$ .

Solve the inequality $\"\"$ .

Add 7 to each part.

$\"\"$

Divide each part by 2.

$\"\"$

$\"\"$ .

This is false statement, so inequality has no solution or $\"\"$ . $\"\"$

The solution set is $\"\"$ and its graph is $\"graph$