$\"\"$ $\"\"$ $\"\"$

\

The equation is $\"\"$ .

\

According to division property of equality: if $\"\"$ , then $\"\"$ .

\

$\"\"$ (Divide each side by 8)

\

$\"\"$ (Cancel common terms)

\

$\"\"$ (Divide: $\"\"$ )

\

Write two cases:

\

Case-1: a = b

\

$\"\"$

\

Case-2: a = $\"\"$ b

\

$\"\"$

\

$\"\"$

\

Solve the equation for Case-2.

\

According to addition property of equality: if a = b, then a + c = b + c.

\

$\"\"$ (Add 7 to each side)

\

$\"\"$ (Apply Additive inverse property: $\"\"$ )

\

$\"\"$ (Add: 9 + 7 = 16) $\"\"$

\

Check:

\

To check the solution, substitute $\"\"$ in original equation.

\

$\"\"$

\

$\"\"$ (Subtract: $\"\"$ )

\

$\"\"$ (Absolute value: |9| = 9)

\

72 = 72 (Multiply: $\"\"$ )

\

Compare the values the equation is true. $\"\"$ is a solution.

\

$\"\"$

\

Solve the equation for Case-2.

\

$\"\"$ (Add 7 to each side)

\

$\"\"$ (Apply Additive inverse property: $\"\"$ )

\

$\"\"$ (Subtract: $\"\"$ ) $\"\"$

\

Check:

\

To check the solution, substitute $\"\"$ in original equation.

\

$\"\"$

\

$\"\"$ (Add: $\"\"$ )

\

$\"\"$ (Absolute value: | $\"\"$ 9| = 9)

\

72 = 72 (Multiply: $\"\"$ )

\

Compare the values the equation is true. $\"\"$ is a solution.

\

$\"\"$

\

The solutions are 16 and $\"\"$ . The solution set is $\"\"$ .