To determine how many minutes it will take Grandma to remove weeds until only 30 remain, we can set up the problem as follows:
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Identify the total weeds: Grandma starts with 250 weeds.
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Determine the target: She wants to have only 30 weeds left.
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Calculate the number of weeds to be removed:
\[ 250 - 30 = 220 \text{ weeds} \]
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Determine the rate of weed removal: Grandma can remove weeds at a rate of 5 weeds per minute.
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Set up the equation to determine the time (m):
\[ 5m = 220 \]
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Solve for m:
\[ m = \frac{220}{5} = 44 \text{ minutes} \]
Meaning of the solution in words: It will take Grandma 44 minutes to remove enough weeds from her garden to reduce the total number of weeds from 250 to 30.