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On Saturday, you bowl at Mar Vista Bowl, where renting shoes costs $2 and each game bowled is $3.50. On Sunday, you bowl at Pinz where the shoe rental is $5 and each game bowled is $3.25. If you spent the same mount each day, how many games, x, were bowled?

2 + 3.5x = 5 + 3.25x

The cost to purchase a song from iTunes is $0.99 per song. To purchase a song from Napster, you must be a member. The Napster membership fee is $10. In addition, each purchased song costs $0.89. How many downloaded songs, x, must be purchased for the monthly price of Napster less than or equal to the cost of iTunes?

10 + 0.89x ≤ 0.99x

A twelve inch candle and an 18 inch candle are lit at 6pm. The 12-in. candle burns 0.5 inches every hour. The 18 inch candle burns two inches every hour. At what time will the two candles be the same height? Let x represent the number of hours.

12 - 0.5x = 18 - 2x

At Trophy Store A trophy costs $12.50. Engraving costs $0.40 per letter. At Trophy Store B, the same trophy costs $14.75. Engraving costs $0.25. How many letters, x, must be engraved for the cost of Trophy Store B be cheaper than Trophy Store A?

12.50 + 0.40x > 14.75 + 0.25x

Bill weighs 120 pounds and is gaining ten pounds each month. Phil weighs 150 pounds and is gaining 4 pounds each month. How many months, x, will it take for Bill to weigh more than Phil?

120 + 10x > 150 + 4x

Container A has 200 L of water, and is being filled at a rate of 6 liters per minute. Container B has 500 L of water, and is being drained at 6 liters per minute. How many minutes, x, will it take for Container B have less water than Container A?

200 + 6x > 500 - 6x

Tim is choosing between two cell phone plans that offer the same amount of free minutes. Cingular's plan charges $39.99 per month with additional minutes costing $0.45. Verizon's plan costs $44.99 with additional minutes at $0.40. How many additional minutes, x, will it take for the two plans to cost the same?

39.99 + 0.45x = 44.99 + 0.40x

UPS charges $7 for the first pound, and $0.20 for each additional pound. FedEx charges $5 for the first pound and $0.30 for each additional pound. How many pounds, x, will it take for UPS and FedEx to cost the same?

7 + 0.2x = 5 + 0.3x

Container A and container B have leaks. Container A has 800 ml of water, and is leaking 6 ml per minute. Container B has 1000 ml, and is leaking 10 ml per minute. How many minutes, x, will it take for the two containers to have the same amount of water?

800 - 6x = 1000 - 10x