Answer:
53 degrees
Step-by-step explanation:
m<J = m<Q
Now, let's do the same as we did for the previous one here.

notice again, how did we get 84 for the 4th element's coefficient? well 36 * 7 / 3. and so on. And you can just expand it from there.
Answer:
B.
Step-by-step explanation:
The easiest way is to substitute 8 for x in the first equation,
Answer:
Solution By Gauss jordan elimination method
x = 3, y = 2 and z = 4