Question x-4-y-
The solution to the given system of equations is . What is the value of ?
x = 4 y = 5 - x The solution to the given system of equations
Easy-difficulty · SAT Math · Systems of Two Linear Equations — Substitution method. Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.
Answer explanation
Choice A is correct. The first equation in the given system of equations is . Substituting for in the second equation in the given system of equations yields , or .
Choice B is incorrect. This is the value of in the solution to the given system of equations, 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.
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