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The sum of two numbers is 26. Find the two numbers if the larger number is 2 less than three times the smaller number.

Beth ate at a steakhouse. The cost of the meal plus a 15% tip was $42.50. What was the cost of the meal before the tip was added?

One day I called two friends and invited them to a party. The next day, each of my two friends called and invited two more friends to the party. The next day, each of the people who had been invited thus far called and invited two more friends to the party. If this...