Respostas

2014-06-23T14:12:40-03:00
2x+20=70
2x=70-20
2x=50
x=50/2
x=25
2 3 2
  • Usuário do Brainly
2014-06-23T14:21:00-03:00
2 . x + 20° = 70°
2x + 20° = 70°
2x = 70° - 20°
2x = 50°
x = 50°/2
x = 25°