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OpenStudy (anonymous):
Use a graphing calculator or spreadsheet software to solve 4x + y + z = 1 8x – 4y – 7z = 2 5y + 9z = 3 using matrices.
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Directrix (directrix):
I used this online Program: To solve a system of linear equations by Matrix solution online http://onlinemschool.com/math/assistance/equation/matr/ The matrix solution is explained. The answers to the system are given. Try it and post what you get, okay.
Directrix (directrix):
@happyturtle3
jimthompson5910 (jim_thompson5910):
the linear algebra toolkit http://www.math.odu.edu/~bogacki/lat/ shows you how to solve this using row reductions. Let me know if you need help on working the website
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