Y = 3bx - 7x
y = x(3b - 7)
Divide each side by 3b - 7 (assume that it is not zero).

Answer:
From the chord theorem we have:

The 84th day since the greatest common multiple is 84.
Hello there!
From that amount of information, you can't get a numerical value for the answer.
Hope This Helps You!
Good Luck :)