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Back to Gauss’s Method

Exercise 21

Avg difficulty 3.0

A box holding pennies, nickels and dimes contains thirteen coins with a total value of 8383 cents. How many coins of each type are in the box? (These are US coins; a penny is 11 cent, a nickel is 55 cents, and a dime is 1010 cents.)

Hefferon, Linear Algebra, Linear Systems, Gauss’s Method, Exercise 21

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Adapted from Linear Algebra © 2016 Jim Hefferon. Licensed under CC BY-SA 3.0 US. Source: Linear Algebra. Imported at revision df2262e.