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

Case-2: 

Solve the equation for Case-1.
\
Check:
\To check the solution, substitute
in original equation.

(The absolute value of 7 is 7)
Compare the values the equation is true.
is a solution.
Solve the equation for Case-2.
\
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
.