To find the number of visits per month at which the two plans cost the same, we can set up an equation based on the costs of each plan:
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First plan: The cost is $8 per visit. Therefore, the total cost for \( x \) visits is: \[ \text{Cost of Plan 1} = 8x \]
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Second plan: The cost is a monthly fee of $40 plus $2 per visit. Therefore, the total cost for \( x \) visits is: \[ \text{Cost of Plan 2} = 40 + 2x \]
To find the point where the costs are equal, we set the two equations equal to each other: \[ 8x = 40 + 2x \]
This is the equation that shows the number of visits per month at which the two plans cost the same.