Question 848757

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.