# SOLUTION: Peter is x years old and his sister is5 years older. If the product of their age is 84 form an equation in x and solve it to find Petr's age. I would really appriciate it if y

Algebra ->  Algebra  -> Customizable Word Problem Solvers  -> Age -> SOLUTION: Peter is x years old and his sister is5 years older. If the product of their age is 84 form an equation in x and solve it to find Petr's age. I would really appriciate it if y      Log On

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 Question 13458: Peter is x years old and his sister is5 years older. If the product of their age is 84 form an equation in x and solve it to find Petr's age. I would really appriciate it if you would assit me in this Thanks.Answer by Earlsdon(6287)   (Show Source): You can put this solution on YOUR website!Peter's age = x. His sister's age = x+5 Subtract 84 from both sides. Solve for x by factoring. Discard, as ages can't be negative. Peter's age is 7 years old and his sister is 12 years old.