I need a clearer understanding of how to solve: Bruce works for 5 hours on Tuesday. On Wednesday he works twice the time he works on Tuesday. On Thursday he works 2 hours less than the time he works on Wednesday. How many hours does Bruce work in all these three days?
On Wednesday, Bruce works for 2 * 5 = 10 hours.
On Thursday, Bruce works for 10 – 2 = 8 hours.
On these three days, Bruce works for 5 + 10 + 8 = 23 hours.