Answer:
19n+9u=7500 and 4u-n
Step-by-step explanation:
Answer:
Monomial Binominal Trimoninal
Degree 1: -9x x + 6
Degree 2: -4

Degree 3: 4
5 - 2

Step-by-step explanation:
I do not know how to explain how I got to this answer, but here is the answer.
The answer is 21
252 / 12 = 21
I hope this helped :)