The equation is
.
Write two cases:
\Case-1:
.

Case-2: 

Solve the equation for Case-1.
\
Apply addition property of equality: Add 3 to each side.
\


Check:
\To check the solution, substitute
in original equation.


The absolute value of
is 7.

Compare the values the equation is true.
is a solution.
Solve the equation for Case-2.
\Apply addition property of equality: Add 3 to each side.
\


Check:
\To check the solution, substitute
in original equation.


\
(The absolute value of
is 7)
Compare the values the equation is true.
is a solution.
The solution set is
.