Solve the riddle “What is too much fun for one, enough for two, and means nothing to three?” The answer to this is hidden in the equations given below.

If 4c = 16, then c = ?

If 4e + 8 = 20, then e =?

If 2r – 3 = 7, then r = ?

If 3t + 8 = 29, then t = ?

If 2s + 4 = 4s, then s =?

To get the answer substitute the numbers for the letters it equals in the following manner: