SOLUTION: A tour group split into two groups when waiting in line for food at a fast food counter. The first group bought 8 slices of pizza and 7 soft drinks for $34.49. The second group bou
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Question 1136389: A tour group split into two groups when waiting in line for food at a fast food counter. The first group bought 8 slices of pizza and 7 soft drinks for $34.49. The second group bought 5 slices of pizza and 5 soft drinks for $22.40. How much does one slice of pizza cost?
Since 5 slices of pizza and 5 soft drinks cost $22.40, it implies that
1 slice of pizza and 1 soft drink cost $22.40/5 = $4.48.
Now you can easily answer the problem's question by subtracting 7 times $4.48 from $34.49. It gives you
one slice of pizza costs $34.49 - 7* $4.48 = $3.13. ANSWER
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Notice that I answered the question without solving equations.
This problem was designed and is expected to be solved exactly in this way - it is a "good style" of solving such problems.
It is the major lesson for you to learn from my solution.
