To find the number of visits per month where the two participation plans cost the same, we can set up an equation.
Let \( x \) represent the number of visits per month.
For the first plan, the cost for \( x \) visits is given by: \[ \text{Cost of Plan 1} = 8x \]
For the second plan, the cost consists of a fixed monthly fee plus a per-visit fee, which can be represented as: \[ \text{Cost of Plan 2} = 40 + 2x \]
To find when both plans are equal in cost, we set the two equations equal to each other: \[ 8x = 40 + 2x \]
This is the equation you need to solve to find the number of visits \( x \) at which the costs of both plans are the same.