You have x , x+7, and 7x-7. When you add those up and equal it to 180 you can get your x. X equals 20
So one angle is 20 degrees
The second angle is 27 degrees
And the third angle is 133 degrees.
Pounds that's what I did with my cat
Answer:
substitute that (6) in X so f(6) = 2(6) which is = 12
