Answers: Equation: 52 = 7x
Octaves: x = 7.43
Explanation:
Let's call x the number of octaves in a piano
Then, every octave has 7 white keys. It means that the number of keys in a piano can be calculated as 7 times x or 7 times the number of octaves:
Number of keys = 7x
Then, the number of keys, in this case, is equal to 52, so we can replace the number of keys by 52 and get:
52 = 7x
Now, we can solve for x, dividing both sides by 7 as:
52/7 = 7x/7
7.43 = x
Therefore, the piano has 7.43 octaves
