Respuesta :
we know that
the alternate exterior angle with angle 1 is equal to the angle 1
so
[angle 1+angle adjacent to the alternate exterior angle with angle 1]=180
Because are supplementary angles
[4x+28]+[14x+8]=180----> 18x+36=180----> 18x=144------> x=144/18
x=8
therefore
the answer is
x=8