Question

podem me ajudar nessas 2 questões?

Answer 1

x+40°+2x+x+2x-30°+3x-10°=360°
9x=360°
x= 360°/9
x= 40°


10x+14°+90°+2x+10°+90°= 360°
12x+204°=360°
12x= 360°-204°
12x= 156
x= 156°/12
x= 13°