Question x-3-y-
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 ?
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x + 3 y = 29 3 y = 11 The solution to the given system
Hard-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
The correct answer is . It's given by the second equation in the system that . Substituting for in the first equation in the system, , yields . Subtracting from both sides of this equation yields .
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