Posted by joy on Wednesday, July 28, 2010 at 9:09pm.
Orly's age is 4 years more than thrice Perla's age. Four years ago, Orly was four times as old as Perla was then. How old is each now?

math  Reiny, Wednesday, July 28, 2010 at 9:18pm
Present age:
Perla  x
Orly  3x+4
four yrs ago
perla  x4
orly  3x+4  4 or 3x
"Four years ago, Orly was four times as old as Perla was then"
> 3x = 4(x4)
3x = 4x  16
x = 16
So Perla is 16 and Orla is 52
check:
now: Perla = 16, Orla = 52
4 yrs ago : Perla = 12, Orla = 48
Is 48 four times 12 ? YEA

math  joy, Wednesday, July 28, 2010 at 9:54pm
Reiny i have some question if Perla is x=16 how about the solution for Orly

math  Reiny, Wednesday, July 28, 2010 at 10:29pm
As I stated above, Orla is 52
I had defined his age as 3x+4, and 2(16)+4 = 52
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