Use row operations to solve the system.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter6: Systems Of Linear Equations And Inequalities
Section6.5: Applying Systems Of Linear Equations
Problem 6PPS
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Use row operations to solve the system.
 
x+
y−
z=
−2
3x−
y+
z=
−2
x−
4y+
2z=
−21
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