The equation is .

Subtract 4 from each side.

Divide each side by 2.

Cancel common terms.

.

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

Case 1: .

Add 6 to each side.

Divide each side by 2.

Cancel common terms.

.

Case 2: .

Add 6 to each side.

Divide each side by 2.

Cancel common terms.

.

To check the solution 1 substitute the value of in the original equation.

.

Because the above statement is true, so the value of is a solution of the original equation.

To check the solution 2 substitute the value of in the original equation.

.

Because the above statement is true, so the value of is a solution of the original equation.

The solutions are .