SOLUTION: The sum of one-fifth of Lucy's age and one-seventh of her age is 12. Use algebra to workout her age. Plz help

Algebra ->  Customizable Word Problem Solvers  -> Age -> SOLUTION: The sum of one-fifth of Lucy's age and one-seventh of her age is 12. Use algebra to workout her age. Plz help      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1040278: The sum of one-fifth of Lucy's age and one-seventh of her age is 12. Use algebra to workout her age. Plz help
Answer by jorel555(1290) About Me  (Show Source):
You can put this solution on YOUR website!
Let n be Lucy's age. Then
n/5+n/7=12
7n+5n=420
n=420/12=35 ☺☺☺