Question

incorrect
your answer is incorrect.
find the value of x.
(there is a quadrilateral with angles 131°, 86°, 68° and x°; and a box with x = 85)

Explanation:

Step1: Recall quadrilateral angle sum

The sum of interior angles of a quadrilateral is $360^\circ$.

Step2: Sum known angles

Calculate total of given angles:
$131 + 86 + 68 = 285$

Step3: Solve for $x$

Subtract sum from $360^\circ$:
$x = 360 - 285$

Answer:

$x = 75$