Answer:
13x+12
Step-by-step explanation:
27x-14x=13
+12 because there is nothing else there
Increments of 100,000.
0 - 1,000,000
Essentially 0, 100,000, 200,000, 300,000, etc.
Step-by-step explanation:

The answer is D. If you substitute those values for n, you should be able to find that 4 makes the expression equal to 6.