Step-by-step explanation:
95°+3x+23+7x-4+9x-6+90°=540
19x +198=540
then simplify by using like terms and the find for x
and the answer of x=18°
Answer:
95+3x+23+9x-6+7x-4+90=540(sum of interior angles in a quadrilateral)
19x+198=540
19x= 342
X=18
