Answer:
C. 666
Step-by-step explanation:
USING PEMDAS we can solve this problem.

A suitable calculator can row-reduce the augmented matrix.
first number: 3
second number: 1
third number: 8
That's correct but whats your question?
Answer:
the second and the fourth have a range of real no
Expanding
-3h-15+2=4h+24-9
-3h-4h=24-9-2+15
-7h=28
h=4