Answer: 1 x 10^3
Step-by-step explanation:
16x-15-9x=13
7x-15=13
+15 +15
x=4
Answer:
504
Step-by-step explanation:
In the attached file
Hope it helps

The answer is above.
Additional note 1:

Additional note 2:
In the answer I filled in "0" at the place where "n" was. This is because the question tells us n=0