Calculate Angle in Triangle with Midpoint

In a triangle ABC, angle A measures 40 degrees and angle B measures 70 degrees. Line segment AD is drawn from vertex A to the midpoint D of side BC. The angle CAD is represented as x degrees. Calculate the value of x.

Using the property of triangles, the sum of interior angles must be 180 degrees. Remember that angles formed at a point, such as angles ADB and ADC, can be used for further calculations.