Brenda spent $80 on ten fancy pens. To find the cost of each pen, you divide the total spent ($80) by the number of pens (10), resulting in $8 per pen. Thus, each pen costs $8.
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First we should put it in a equation. So 10+p=80. 10 would be the 10 pens and p stands for p. So we take 80 and divide it by 10. So p=8. Each pen cost $8. ;