<u>Answers:</u>
1)
If we want to solve equations with absolute values we must know we have to find the solution for both positive and negative values. This is because positive and negative values have a positive absolute value.
In a mathematical form this is:
<h2>For any positive number

, the solution to

is:
</h2><h2>

or

</h2>
In this case we have to clear
first:
This means
or
Therefore, the answer is B
2)
In the case of inequalities we have the following statement:
<h2>For any positive value of

:
</h2><h2>

is equivalent to

</h2><h2>

is equivalent to

or

</h2>
Where
may be a normal variable or an algebraic expression, as the expression in this exercise.
According to the explained above:
is equivalent to
This means we have to solve the inequality for both cases.
<u> Case 1:
</u>
<u>Case 2:
</u>
Then,
or
3)
This means
or
<u>Case 1:
</u>
<u>Case 2:
</u>
Then, the answer is A:
or