A theater owner wants to divide a 4200 seat theater into 3 sections, with tickets costing $60, $70, $100, depending on the section. He wants to have as many $60 tickets as the sum of the other tickets, and he wants to earn $284,000 from a full house. Find how many seats he should have in each section.

You coordinate volunteers for litter cleanup in local parks. your spreadsheet lists drivers and the number of seat belts in each driver’s car. the spreadsheet calculates the number of drivers (d) and the total number of seat belts (s). you want to know the maximum number of volunteers, besides drivers, that can be transported to the park in a single trip given that each person must have a seat belt of their own.