Question in-the
In the solution to the system of equations above, what is the value of y ?
9
15
In the solution to the system of equations above, what is the value of y ?
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
Choice D is correct. Multiplying both sides of 
by 5 results in 
. Multiplying both sides of 
by 2 results in 
. Subtracting the resulting equations yields 
, which simplifies to 
. Dividing both sides of by 
results in 
.
Choices A and B are incorrect and may result from incorrectly subtracting the transformed equation. Choice C is incorrect and may result from finding the value of x instead of the value of y.
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