Answer:
H = 58, I = 71, J = 51
Step-by-step explanation:
Set all angles equal to 180
3x - 2 + 4x - 9 + 3x - 9 = 180
Then combine like terms
10x - 20 = 180
+ 20 + 20
10x = 200
/10 /10
x = 20
Then plug in for each angle
3 (20) - 2 = 58
4 (20) - 9 = 71
3 (20) - 9 = 51
