Question

x+130º=180

x+10º=180

x+100º=180

Answer 1

x + 130° = 180°

x = 180° - 130°

x = 50°

x + 10° = 180°

x = 180° - 10°

x = 170°

x + 100° = 180°

x = 180° - 100°

x = 80°