To find out after how many months both clubs cost the same, we can set up an equation for the total cost of each club.
Let \( m \) be the number of months.
Cost for Club A: \[ \text{Cost}_A = 10 + 15m \]
Cost for Club B: \[ \text{Cost}_B = 25 + 12m \]
We want to find the value of \( m \) when the costs are equal: \[ 10 + 15m = 25 + 12m \]
Now, let's solve for \( m \):
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Subtract \( 12m \) from both sides: \[ 10 + 3m = 25 \]
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Subtract 10 from both sides: \[ 3m = 15 \]
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Divide by 3: \[ m = 5 \]
Thus, after 5 months, both clubs will cost the same.