Example

Solve an Application using a System of Three Linear Equations (Try It 4.71)

To formulate an application using a system of three linear equations, consider a fine arts department that sold adult tickets for $2020, student tickets for $1212, and child tickets for $1010. They sold a total of 350350 tickets and brought in $4,6504{,}650. The number of child tickets sold was the same as the number of adult tickets.

Let xx be the number of adult tickets, yy be the number of student tickets, and zz be the number of child tickets. The system of equations modeling this application is:

{x+y+z=35020x+12y+10z=4650xz=0\begin{cases} x + y + z = 350 \\\\ 20x + 12y + 10z = 4650 \\\\ x - z = 0 \end{cases}

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Updated 2026-05-25

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