3x+x+20+x=180

5x=180−20

5x=160

x=32°

egin{gathered}3x = 3(32) = 96° x+20 = 32+20 = 52° x = 32° oxed{(32°,52°,96°)}end{gathered}

3x=3(32)=96°

x+20=32+20=52°

x=32°

(32°,52°,96°)

2) egin{gathered}2x+2x+20+x = 180 5x = 180-20 5x = 160 oxed{x=32°}end{gathered}

2x+2x+20+x=180

5x=180−20

5x=160

x=32°

egin{gathered}2x = 2(32) = 64° 2x+20 = 64+20 = 84° x = 32° oxed{32°,64°,84°}end{gathered}

2x=2(32)=64°

2x+20=64+20=84°

x=32°

32°,64°,84°

Explicação passo-a-passo:

espero ter ajudado