Book Maths Puzzle Algebra

C=(5/9) (F-32) Using this equation determine the temmperature at which Fahrenheit & Celsius will be the same.

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Book Other Question

Solve for the variables 'a' & 'b' (only the positive solutions) where, (a-b) x (a+b) = 9 x 5. Sorry, I didn't write the whole problem...A hotel purchased 38 bath towels and 61 washcloths for a total cost of $791.50. A second purchase of 54 bath towels and 50 washcloths, at the same prices, cost $923. Find the individual prices of the bath towels and washcloths. Hopefully this is more clear and able to be done. Thank you!!!