The expression 3x + 3 = 3(x + 1) is an example of a distributive postulate. It says that multiplying a number by a group of numbers added together is the same as doing each multiplication separately.
. Rates: Ryan: 1 hole per 5 hours Castel: 1 hole per 6 hours . Let x = time if working together then x(1/5 + 1/6) = 1 x(6 + 5) = 30 11x = 30 x = 30/11 x = 2.7273 hours or x = 2 hours and 44 minutes
