Math Problem Statement
En el sistema d'equacions lineal: x+y+z=1−x+2y−z=−72x−y+z=6 El valor de la incògnita z és:
Solution
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Math Problem Analysis
Mathematical Concepts
Linear Equations
System of Equations
Substitution Method
Reduction Method
Formulas
x + y + z = 1
-x + 2y - z = -7
2x - y + z = 6
Theorems
Linear Equation Solving Theorem
Substitution and Elimination Methods for Systems of Equations
Suitable Grade Level
Grades 8-10
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