VJesus12 wrote: ↑Sat Jun 26, 2021 5:38 am
If \(2x + y = 7,\) what is the value of \(x?\)
(1) \(y = 3\)
(2) \(3x + y = 9\)
Answer:
D
Source: Manhattan GMAT
Given: 2x + y = 7
Target question: What is the value of x ?
Statement 1: y = 3
Substitute into the given equation to get:
2x + (3) = 7
Solve to get
x = 2
Since we can answer the
target question with certainty, statement 1 is SUFFICIENT
Statement 2: 3x + y = 9
We can rewrite this equation as follows: x + (2x + y) = 9
Since the given information tells us that
2x + y = 7, we can take x + (2x + y) = 9 and substitute to get: x +
7 = 9
Solve to get
x = 2
Since we can answer the
target question with certainty, statement 2 is SUFFICIENT
Answer: D
Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
