Question 517243
Let
Present age of Darla = d



Her age in three years = d+3
Her age 8 years ago = d-8

In 3 years Darla will be twice as old as she was 8 years ago. 

d+3=2(d-8)
d+3=2d-16
d-2d=-16-3
-d=-19
Multiply by -1 both sides
d=19

Darla is 19 years old Now!!!