SOLUTION: Jimmy is twice as old as his daughter. 12 years ago, he was three times her age. Determine how old Jimmy’s daughter is now.

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Question 1003778: Jimmy is twice as old as his daughter. 12 years ago, he was three times her age. Determine how old Jimmy’s daughter is now.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Jimmy is twice as old as his daughter.
j = 2d
12 years ago, he was three times her age.
j - 12 = 3(d - 12)
j - 12 = 3d - 36
j = 3d - 36 + 12
j = 3d - 24
replace j with 2d
2d = 3d - 24
24 = 3d - 2d
24 = d
:
Determine how old Jimmy’s daughter is now. She's 24