Question

calcule o valor de x e y

Answer 1

2x-30°+3x+20°=180°
5x+10°=180°
5x=180°-10°
x=170°/5=34°

3x+20°+y=180°
3.34°+20°+y=180°
68°+20°+y=180°
y=180°-68°-28°
y=84°