karthikpandian19 wrote:In x + 2 years, Joe’s age will be double what it was x – 7 years ago. If Joe was x years old 6 years ago, how old will Joe be in 3 years?
9
12
15
18
21
We can plug in the answers choices, which represent how old Joe will be in 3 years.
Answer choice C: 15
Joe now = 15-3 = 12.
Six years ago, Joe = x = 12-6 = 6.
In x + 2 years, Joe’s age will be double what it was x – 7 years ago.
x-7 = -1.
Too small.
Eliminate A, B and C.
Answer choice D: 18
Joe now = 18-3 = 15.
Six years ago, Joe = x = 15-6 = 9.
In x + 2 years, Joe’s age will be double what it was x – 7 years ago.
x-7 = 9-7 = 2.
2 years ago, Joe = 15-2 = 13.
x+2 = 9+2 = 11.
In 11 years, Joe = 15+11 = 26.
Success!
The correct answer is
D.
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