Find the value of x

Question

95
120
120
172
125
X
Show work

Use (n-2) 180 to find the sum of interior angles. Add the total. The subtract from the sum mentioned above

Answer 1

(95 + 120 + 120 + 172 + 125) - (180 x 4) = X

(622 - 720) = -98

X = -98