Praxis Math 5165 Practice Questions - Praxis Mathematics Content Knowledge (5165) Exam

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A teacher asks students to solve the system 2x + y = 11 and x - y = 1. Which student method is valid and leads to the correct solution?

Add the equations to get 3x = 12, then x = 4 and y = 3 Subtract the second equation from the first to get x = 10, then y = 1 Multiply the first equation by 2 and conclude x = 11 Set 2x + y equal to x - y and solve x = -12

Correct Answer:

Add the equations to get 3x = 12, then x = 4 and y = 3

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