SOLUTION: Pls help out in solving:15 years ago, a father was thee times as old as his son. In 5 years time the son will be exactly half of the father age. Find the present age of the father

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Pls help out in solving:15 years ago, a father was thee times as old as his son. In 5 years time the son will be exactly half of the father age. Find the present age of the father       Log On


   

Question 976046: Pls help out in solving:15 years ago, a father was thee times as old as his son. In 5 years time the son will be exactly half of the father age. Find the present age of the father and the son?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
What are the times? Now, fifteen years ago, in five years.
What are the ages now? x, the son, y, the father.

__________15 years ago__________now_________5 years future
Father__________________________y______________
Son_____________________________x______________

Fill the cells.

__________15 years ago__________now_________5 years future
Father_____y-15__________________y______________y+5
Son________x-15__________________x______________x+5

What does the description say in symbols?
system%28y-15=3%28x-15%29%2Cx%2B5=%281%2F2%29%28y%2B5%29%29

Solve the system for x and y.