Back to 11.7 Solving Systems with Inverses

11.7 Exercise 78

Avg difficulty 2.5

Write a system of equations that represents the situation. Then, solve the system using the inverse of a matrix.

Three roommates shared a package of 12 ice cream bars, but no one remembers who ate how many. If Micah ate twice as many ice cream bars as Joe, and Albert ate three less than Micah, how many ice cream bars did each roommate eat?

OpenStax Algebra and Trigonometry 2e, 11.7 Solving Systems with Inverses, exercise 78

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Adapted from College Algebra © 2021 Rice University. Licensed under CC BY 4.0. Sources: College Algebra 2e, Algebra and Trigonometry 2e, Precalculus 2e, College Algebra with Corequisite Support 2e. Imported at revision 4922e46.