The textbook for a biology class cost $14 more than twice the cost of a used textbook for college algebra. If the cost of the two books together is $128, find the cost of the biology book.
A) $76
B) $85
C) $62
D) $90
E) $104

Question

Quizplus · Accepted Answer

Let x be the cost of the used college algebra textbook.

Then the cost of the biology textbook is 2x + $14.

We know that the sum of the costs of the two books is $128:

x + (2x + $14) = $128

Simplifying this equation, we get:

3x + $14 = $128

Subtracting $14 from both sides, we get:

3x = $114

Dividing both sides by 3, we get:

x = $38

So the cost of the biology textbook is 2x + $14 = $90.

Therefore, the answer is D.

The Textbook for a Biology Class Cost $14 More Than