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add numbers below to each number at the top
X and T
Alpha symbol is the letter a.Greek letter alpha can't be displayed here. See link below.
The leading tone in any key is one half-step below the tonic. In the key of D-sharp, the leading tone is C-double-sharp (it can't be spelled as D-natural, because the letter D is already used for the tonic).
still is 70 double the half of any number is still the same number 70/2 x 2 = 70 for example, as the 2 below cancels out the other 2 above.