ABC Bookstore sells one customer 12 used books and 4 new books for 136. Another customer buys 14 used books for 124. How much is

Question

2 years ago

14

one used book (u), and one new book (n)?

1 answer:

Lubov Fominskaja [6] · Answer 1 · 2023-07-21T16:24:46+03:00

An equation is formed of two equal expressions. The cost of a new book is $7.43, while the cost of an old book is $8.86.

<h3>What is an equation?</h3>

An equation is formed when two equal expressions are equated together with the help of an equal sign '='.

Given the cost of 14 used books is $124. Therefore, the cost of a single used book is,

Cost of single used book(u) = 124/14 = $8.86

Also, the cost of 12 used books and 4 new books is $136. Therefore, the equation can be written as,

12u + 4n = 136

12(8.85) + 4n = 136

106.2 + 4n = 136

n = $7.43

Hence, the cost of a new book is $7.43, while the cost of an old book is $8.86.

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