Math Problem Statement
1. Para que o par ordenado (2, – 1) seja solução do sistema { 2x + y = 3 −x + by = −4 , o valor de b deve ser igual a: a) 1 b) 2 c) 3 d) 4 e) – 2
Solution
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Math Problem Analysis
Mathematical Concepts
Systems of Linear Equations
Substitution Method
Equation Solving
Formulas
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Theorems
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Suitable Grade Level
Grades 9-12