SOLUTION: Dan and Linda have a combined age of 60. In four years, Dan will be three times as old as Linda. What are there current ages?

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Question 848757: Dan and Linda have a combined age of 60. In four years, Dan will be three times as old as Linda. What are there current ages?
Answer by harpazo(655) About Me  (Show Source):
You can put this solution on YOUR website!

D + L = 60....Equation A
D + 4 = 3(L + 4)...Equation B
Solve Equation A for D and then plug into Equation B to find L.
D = 60-L
60-L + 4 = 3L + 12
64-L = 3L+12
-L-3L = 12-64
-4L = -52
L = -52/-4
L = 13
Linda is 13.
To find Dan's age, plug 13 for L in Equation A or B (your choice).
I will use Equation A.
D + L = 60
D + 13 = 60
D = 60-13
D = 47
Dan is 47.