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12. Two rental halls are considered for a wedding. Hall A costs $50 per person. Hall B costs $2000, plus $40 per person. Determine the number of people for which the halls will cost the same to rent. a) Model this problem with an equation. b) Solve the problem. c) Verify the solution. 13. Five subtract 3 times a number is equal to 3.5 times the same number, subtract 8. Write, then solve an equation to determine the number. Verify the solution. 14. A part-time sales clerk at a store is offered two methods of payment. Plan A: $1500 per month with a commission of 4% on his sales Plan B: $1700 per month with a commission of 2% on his sales Let s represent the sales in dollars. a) Write an expression to represent the total earnings under Plan A. b) Write an expression to represent the total earnings under Plan B. c) Write an equation to determine the sales that result in the same total earnings from both plans. d) Solve the equation. Explain what the answer represents