Question

find the value of x.

Explanation:

Step1: Recall sum of angles in quadrilateral

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

Step2: Set up equation

$125 + 75+75 + x=360$.

Step3: Simplify left - hand side

$275 + x=360$.

Step4: Solve for x

$x = 360 - 275$.
$x=85$.

Answer:

$x = 85$