SOLUTION: A pumpkin farm charges a fixed amount for the first three pumpkins purchased and an extra amount for each additional pumpkin purchased. If the cost of seven pumpkin $15 and the cos

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Question 703554: A pumpkin farm charges a fixed amount for the first three pumpkins purchased and an extra amount for each additional pumpkin purchased. If the cost of seven pumpkin $15 and the cost of ten pumpkins is $21, what is the fixed charge for the first three pumpkins? Please answer ASAP!
Answer by nshah11(47) About Me  (Show Source):
You can put this solution on YOUR website!
Let the fixed amount be $f and let the extra amount charged for each additional pumpkin after 3 pumpkins are bought be $e.
f + 4e = 15
f + 7e = 21
3e = 6 => e = $2
f = 15-8 = $7