Set up a system of linear equations to represent the scenario. Solve the system by using Gaussian elimination or Gauss-Jordan elimination.
Robert stayed in three different cities (Washington, D. C., Atlanta, Georgia, and Dallas, Texas) for a total of 12 nights. He spent
three times as many nights in Dallas as he did in Washington. The total cost for 12 nights (excluding tax) was $1800. Determine
the number of nights that he spent in each city.
8 08 B & B
City
Washington
Atlanta
Dallas
Cost per Night
$220
$70
$180
Robert spent
night(s) in Washington, night(s) in Atlanta, and
night(s) in Dallas