$\"\"$

The equation is $\"\"$ .

Apply division property of equality: If $\"\"$ then $\"\"$ .

Divide each side by 4.

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$\"\"$ . $\"\"$ Substitute the values of $\"\"$ in the equation $\"\"$ .

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Apply formula: $\"\"$ .

$\"\"$

$\"\"$ . $\"\"$

The value of $\"\"$ .