You can
put this solution on YOUR website!5x-2=y --->y=5x-2
In eight years her dad's age = y+x
In eight years her age = x+8
3(x+8)=y+8
SUbsitute:
3x+24=5x-2+8
3x+24=5x+6
-2x=-18
x=9
y=5(9)-2
y=43
Hence, Heidi is 9 years old and her dad is 43 years old.
Paul.