A child's train ticket costs $7. That is 1/4 as much as an adult's ticket. How much does an adult's train ticket cost?

(1/4)x = 7

x = 7/(1/4)
x = 7 * (4/1)
x = 28

Mona and her son must take the train. They are told that a chil's ticket xosts in only 2/3 of an adult's ticket. Knowing that an adult's tocket costs $8.50 more than a childs ticket, find the price of each person's ticket.

28

To find out how much an adult's train ticket costs, we can use the information given about the child's ticket.

First, let's set up an equation to represent the relationship between the child's ticket cost and the adult's ticket cost. We know that the child's ticket costs $7, which is 1/4 of the adult's ticket cost.

Let's represent the adult's ticket cost with the variable "A". The equation can be written as:

A = 4 * C

Where A represents the adult's ticket cost and C represents the child's ticket cost.

We know from the given information that C = $7. Substituting this value into the equation, we get:

A = 4 * 7

Simplifying this equation, we find:

A = $28

Therefore, an adult's train ticket costs $28.