Hailey needs $852 to buy a game system. She has already saved $555. She gets $14 an hour for doing yard work, and will work 13 hours in the next month. She can save $9 a week from her allowance. How many weeks of allowance will it take Hailey to save enough to buy the game system? Explain how you solved the problem. Use one or more equations in your explanation. Tel what your variables represent.​