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1. Roman mixes 12 liters of 8% acid solution with a 20% acidsolution, which results in a 16% acid solution. Find the number ofliters of 20% acid solution in the new mixture. Construct a table toorganize the information, and show all of your work to solve theproblem.


2.  Gavin and Seijiboth worked hard over the summer. Together, they earned a total of $425.Gavin earned $25 more than Seiji. How much did each of them earn?

  1. Write a system of two equations with two variables to model this problem.
  2. Use substitution or the elimination method to solve the system.
  3. Graph both equations.
  4. Answer the question.

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