Respostas

2014-08-14T14:13:26-03:00
3x+45°=180°
3x=180°- 45°
3x=135°
x=135°÷3
x=45°
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  • Usuário do Brainly
2014-08-14T14:33:02-03:00
X + x + 30° + x + 15° = 180°
x + x + x = 180° - 30° - 15°
3x = 135°
x = 135°/3
x = 45°