Question 39946
Heidi is x years old
Molly is x-4 years old
In 3 years Molly will be x+3-4 and Heidi will be 2(x-1)
EQUATION:
2(x-1)=x+3
2x-2=x+3
x=5
5-4=1
Hence, Heidi is 5 years old and Molly is 1 year old.
Paul.