Na figura as retas r& s são paralelas o valor de x é

14)
2x-30+3x+20=180
5x-10=180
5x=180+10
5x=190
x=190÷5
x=38°

3x+20+y=180
3(38)+20+y=180
114+20+y=180
y=180-134
y=46°

complemento
90°-y=90-46=44°

16)
130+z=180
z=180-130
z=50°

50°+y=180°
y=180-50
y=130°

y=x+z
130°=x+50°
x=130-50
x=80°

x+y+z=80°+130°+50°=260°​