3x+1 = 5x-15
3x+1-5x = -15
-2x+1 = -15
-2x=-15-1
-2x=-16
x = 8
Answer:
x=84
Step-by-step explanation:
the sum of the angles in a pentagon is always 540 so do
540-131-108-107-110=84
(3,-1)