Question

sean A,B y C los angulos de un triangulo donde A =(6×-12)° B=(7×-4) C=(3×+4)° halla la medida del angulo B

Answer 1

A = (6× - 12)°
B = (7× - 4)
C = (3× + 4)°

A + B + C = 180°
(6× - 12)° + (7× - 4) + (3× + 4)° = 180°
16× - 12 = 180°
16× = 192°
× = 12°