Question 1003778
 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