AlgebraEasy–MediumTextbooks sold from a total
Algebra practice question
A bookshop sold 60 copies of a novel at 8 dollars each and t copies of a textbook at 15 dollars each, taking 780 dollars in total. What is the value of t?
Answer: 20
480 + 15t = 780 gives 15t = 300, so t = 20.
Common wrong answers
- If you answered 52
- 52 divides 780 by 15 without removing the novels' 480 dollars.
- If you answered 300
- 300 stops at 15t = 300.
- If you answered 37.5
- 37.5 divides 300 by 8 instead of 15.
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