exam Maths Puzzle Numerical Ability

if F = 9 fifths C+32, find C when F = 95.

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exam Other Question

There are three bins of marbles. They are labeled white, black, and mixed. Each bin is incorrectly labeled. You cannot see inside the bins. How can you draw one marble from one bin and then correctly label all the bins? solve the following equation by completeing the square

x2+3x=5