9. Angles in a quadrilateral

The four angles in a quadrilateral \(ABCD\) are \(\angle A = (x + 70)^{\circ}\), \(\angle B = (3x - 10)^{\circ}\), \(\angle C = (4x + 40)^{\circ}\) and \(\angle D = (2x + 90)^{\circ}\). Find the value of \(x\) and find the measures of each of the angles.

 

 

\(x =\)

 

\(\angle A =\) \(^{\circ}\)

 

\(\angle B =\) \(^{\circ}\)

 

\(\angle C =\) \(^{\circ}\)

 

\(\angle D =\) \(^{\circ}\)