2x+y-z=9  -x+6y+2z=-17  5x+7y+z=4  solve using elimination

Intermediate Algebra
19th Edition
ISBN:9780998625720
Author:Lynn Marecek
Publisher:Lynn Marecek
Chapter9: Quadratic Equations And Functions
Section9.2: Solve Quadratic Equations By Completing The Square
Problem 9.26TI: Solve by completing the square: z2+8z=19 .
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2x+y-z=9 

-x+6y+2z=-17 

5x+7y+z=4 

solve using elimination 

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