$\"\"$

The equation is $\"\"$ .

Add 4 to each side.

$\"\"$

Divide each side by 7.

$\"\"$ \ \

Squaring on each side.

$\"\"$ .

$\"\"$

Check:

Substitute the value of $\"\"$ in $\"\"$ .

$\"\"$

$\"\"$ \ \

$\"\"$ .

Since the above statement is true, $\"\"$ is a solution of $\"\"$ .

$\"\"$

The solution is $\"\"$ .