Question

Find the x value for this problem

Answer 1

180 - 105 = 75

180 = 75 + 25 + x
x = 180 - 75 - 25
x = 80°

Answer 2

x = 80

Explanation:

The exterior angle of a triangle is equal to the sum of the opposite interior angles

25+x = 105

Subtract 25 from each side

25+x-25 = 105-25

x = 80