Question

The angles of a triangle are 80°, 2x + 2°, and 5x°.

Answer 1

80 + 2x+2 +5x = 180
7x = 180 - 80 - 2
7x = 198
x = 14

Answer 2

The sum of interior of all angles in a triangle = 180
Given 3 angles = 80°, 2x + 2°, and 5x°
To find x:

80°+  2x + 2 +  5x = 180
7x + 82 = 180
        7x = 98
          x = 14

answer
x = 14