$\"\"$

Since the polygon is a quadrilateral is, $\"\"$ .The sum of the measures of interior angles of a quadrilateralis $\"\"$ .

$\"\"$ (Sum of measures of interior angles)

$\"\"$ (Substitute the corresponding angle measures)

$\"\"$ (Combine like terms)

$\"\"$ (Add 8 to each side)

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

Use the value of x to determine each interior angle of the quadrilateral.

$\"\"$ ,

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

The interior angle of the quadrilateral are

$\"\"$ ,

$\"\"$ , $\"\"$ ,

and $\"\"$ .