Final answer:
John will have $3 left after purchasing the book and drink, which he subtracts from his initial $10 budget. This calculation highlights that his total expenses were $7, leaving him with the remaining $3.
Step-by-step explanation:
John started with $10 and spent $4 on the book and $3 on the drink, totaling $7 spent. Subtracting this from the initial amount ($10 - $7) leaves John with $3.
John's initial budget was $10. After purchasing the book for $4 and the drink for $3, the total expenses amounted to $7. By subtracting the total expenditure from his initial amount ($10 - $7), it's evident that John will have $3 remaining after buying both items.
In summary, John will have $3 left after purchasing the book and drink, which he subtracts from his initial $10 budget. This calculation highlights that his total expenses were $7, leaving him with the remaining $3.