Answer: $50 per month
Step-by-step explanation: Take 400 and divide it by the amount of months.
Answer:
a. 
b. 
c. 
d. -6t - 5
Step-by-step explanation:
When a number has the same variable as another, you can add or subtract them
So for the first one, you can do

(But don't forget the
!)
So it is:

Continue this process for the rest of them
3/5 both 12 and 20 can both be divided by 4