Question if-is-
1.4 Systems of Two Linear Equations - Substitution method
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If 
is the solution to the given system of equations, what is the value of y ?
Enter your answer:
If is the solution to the given system of equations, what is the value of y
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
The correct answer is 23. Since it’s given that 
, the value of y can be found by substituting 2 for x in the first equation and solving for y. Substituting 2 for x yields 
, or 
. Subtracting 6 from both sides of this equation yields 
.
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