Question

calcule x sabendo que os angulos sao suplementares

Answer 1

b) x+x+10°=180
    2x+10°=180
    2x=180°-10°
    2x=170
    x=170/2
    x=85
c) 5x-30°+2x=180°
    5x+2x=180°+30°
    7x=210
    x=210/7
    x=30