Question 551571
angle c --x degrees
angle A = 3x+20
Angle B = 3x+20

3x+20+3x+20+x=180 ( sum of nagles of triangle = 180 degrees)

7x+40=180
7x= 180-40
7x=140
/20
x= 20

Angle C = 20
Angle B = 3x+20 = 60+20=80
Angle A= 80