SOLUTION: Please help me solve these two problems: First problem, an instrument store gives a 10% discount to all sutdents off the original cost of an instrument. During a back to school

Question 608757: Please help me solve these two problems:
First problem, an instrument store gives a 10% discount to all sutdents off the original cost of an instrument. During a back to school sale an additional 15% is taken off the discounted price. Julie, a student at the local high school, purchases a flute for $306. How much did it originally cost?

Second problem, the cost to ride on a ferry is $5.00 per vehicle and driver with an additinal cost of 50 cents per passenger. If the charge to get on the ferry is $6.50, how many people were in the vehicle?
Thank you very much...
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
x * (1.00 - .10) * (1.00 - .15) = 309

5 + x(.50) = 6.50
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