MHB When the temperature when degree Celsius is equal to degree Fahrenheit

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The discussion focuses on finding the temperature at which degrees Celsius equals degrees Fahrenheit. To solve the equation, one can replace Celsius (C) with Fahrenheit (F) or vice versa. The formula to use is F = (C × 9/5) + 32. Setting C equal to F leads to the equation F = (F × 9/5) + 32, which simplifies to find the specific temperature. The solution reveals that the two scales are equal at -40 degrees.
Yazan975
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View attachment 8405

Q7, b is where I got stuck
 

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We need to solve for it when C= F.

so replace C with F or F with C in the equation and solve for it.
 
Here is a little puzzle from the book 100 Geometric Games by Pierre Berloquin. The side of a small square is one meter long and the side of a larger square one and a half meters long. One vertex of the large square is at the center of the small square. The side of the large square cuts two sides of the small square into one- third parts and two-thirds parts. What is the area where the squares overlap?

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