"I am 3 times as old as Sue is," Frank sold to Ann. "On the other hand, I am 15 years older than John while Sue is 1 year younger than John. How old am I?"
If represents John's age, then which of the following equations could ble used to solve the problem?

A80-foot piece of siding is cut into three pieces so that the second piece is four times four times as long as the first piece and the third piece is five times as long as the first piece. if x represents the length of the first piece, find the lengths of all three pieces.

What is the value of x in the this question ?

Which strategy is used by public health to reduce the incidence of food poisoning?