Posted by Jasmine on Wednesday, April 20, 2011 at 8:28pm.
Sally's grandfather is 67 and Sally is 19. At what age will Sally be exactly 1/3 of her grandfathers age? How old will her grandfather be then?

Math  MathMate, Thursday, April 21, 2011 at 2:33pm
In x years:
19+x=(67+x)/3
solve for x.