To find the number of visits per month at which the cost of the two plans is equal, we need to set up equations for both plans.
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First Plan: The cost is $20 per visit. If we let \( x \) be the number of visits, the total cost for this plan is: \[ \text{Cost for Plan 1} = 20x \]
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Second Plan: The cost is $45 per month plus $5 per visit. Therefore, the total cost for this plan is: \[ \text{Cost for Plan 2} = 45 + 5x \]
We want to find \( x \) such that both costs are equal: \[ 20x = 45 + 5x \]
This equation matches with the first option provided in your responses: 45x = 20 + 5x
So the correct equation representing the situation is: \[ 20x = 45 + 5x \]
This shows the number of visits per month at which the costs of the two plans are equal.