Thomas, Toby, and Rebecca worked a total of 157 hours in one week.  Thomas worked x hours.  Toby worked 10 hours less than twice what Thomas worked, and Rebecca worked 8 hours less than Toby.  How many hours did Rebecca work?
Toby: 2x-10
Rebecca: (2x-10)-8=2x-18
Total:2x-10+2x-18+x=157
5x-28=157
5x=185
x=<<37=37>>37 hours
Rebecca:2(37)-18=56 hours
#### 56