Question 3-x-12
1.4 Systems of Two Linear Equations - Substitution method
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The solution to the given system of equations is . What is the value of ?
A.
B.
C.
D.
3 x = 12 - 3 x + y = - 6 The solution to the
Medium-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 B is correct. Adding the second equation in the given system to the first equation in the given system yields , which is equivalent to .
Choice A is incorrect and may result from conceptual or calculation errors.
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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