How do you solve recursive formulas

Find the common ratio. (The number you multiply or divide.) 3. Create a recursive formula by stating the first term, and then stating the formula to be the common ratio times the previous term.

The skating rink rented 872 pairs of skates during april and may.why? : if the skating rink rented three times the pair of skates in april during may, they rented 654 skates. 218 x 3 = 654then, if they want to know how many they rented during both april and may, then you just add 654 (may) and 218 (april) to give you 872 pairs of skates for both months.654 + 218 = 872hope this !

Ithink the answer may be -7 by when dividing both sides by -3