How do you find the values of angles for a triangle when the only info you have is 3x+7 and angle a and b are the same angle a is 70 degrees

How do you find the values of angles for a triangle when the only info you have is 3x7 and angle a and b are the same angle a is 70 degrees class=

Respuesta :

54.Angle A=70°
Angle B=Angle A
Angle B=(3x+7)°
3x+7=70
3x=63
x=63/3
x=21

55.4x+3=45
4x=42
x=10.5