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Algebra
/ Systems of two linear equations in two variables
Difficulty: Medium
The solution to the given system of equations is . What is the value of y?
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Explanation
Choice A is correct. The given system of linear equations can be solved by the elimination method. Multiplying each side of the second equation in the given system by yields , or . Subtracting this equation from the first equation in the given system yields , which is equivalent to , or .
Choice B is incorrect. This is the value of , not the value of .
Choice C is incorrect and may result from conceptual or calculation errors.
Choice D is incorrect and may result from conceptual or calculation errors.