To find out how much your friend originally spent, we first need to determine the total amount you paid for the bicycle and helmet.
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Calculate the total amount you paid:
- Bicycle: $63
- Helmet: $21
- Total cost = Bicycle + Helmet = \(63 + 21 = 84\) dollars.
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The total cost is 150% of what your friend originally spent: \[ 1.5 \times \text{Original Cost} = 84 \]
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To find the original cost, divide the total cost by 1.5: \[ \text{Original Cost} = \frac{84}{1.5} = 56 \]
So, your friend originally spent $56.
- Next, calculate how much money your friend earned by selling the bicycle and helmet:
- Earnings = Total Paid - Original Cost
- Earnings = \(84 - 56 = 28\) dollars.
In conclusion:
- Your friend originally spent $56.
- Your friend earned $28 by selling the bicycle and helmet to you.