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Meg is twice as old as Rolf, but three years ago, she was tw
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22 Oct 2018, 02:49
22 Oct 2018, 02:49
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Question Stats:
90% (01:00) correct
9% (01:22) wrong based on 43 sessions
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Meg is twice as old as Rolf, but three years ago, she was two years older than Rolf is now. How old is Rolf now?
Show: :: Years Old
5
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Re: Meg is twice as old as Rolf, but three years ago, she was tw
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22 Oct 2018, 09:14
22 Oct 2018, 09:14
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Carcass wrote:
Meg is twice as old as Rolf, but three years ago, she was two years older than Rolf is now. How old is Rolf now?
Show: :: Years Old
5
Let R = Rolf's PRESENT age
So 2R = Meg's PRESENT age [since we're told that Meg is TWICE as old as Rolf]
Now that we know Meg's PRESENT ages, we can find her age THREE YEARS AGO by subtracting 3 from her PRESENT age.
So, 2R - 3 = Meg's age THREE YEARS AGO
Three years ago, Meg was two years older than Rolf is now
So, we can write: (Meg's age THREE YEARS AGO) = (Rolf's PRESENT age) + 2
In other 2R - 3 = R + 2
Solve to get: R = 5
ow old is Rolf NOW?
Since R = Rolf's PRESENT age, we know that his age is 5
Answer: 5
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Meg is twice as old as Rolf, but three years ago, she was tw
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16 Mar 2019, 01:26
16 Mar 2019, 01:26
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1
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Meg is twice as old as Rolf, but three years ago, she was two years older than Rolf is now. How old is Rolf now?
Show: :: years old
5
