If you would like to write the equation Y - 1 = 5/6 * (x - 4) in standard form, you can do this using the following steps:
Y - 1 = 5/6 * (x - 4)
Y - 1 = 5/6 * x - 5/6 * 4
Y - 1 = 5/6 * x - 10/3
Y - 5/6 * x = 1 - 10/3
Y - 5/6 * x = - 7/3 /*6
6 * Y - 5 * x = - 14
The correct result would be 6 * Y - 5 * x = - 14.