Question

You bought 5 science books and a study table for 450 dollars. If the table cost 50 dollars, find the price of 1 book.

• A. 80 dollars
• B. 60 dollars
• C. 70 dollars
• D. 90 dollars

Answer 1

The correct option is A 80 dollars

Total cost of books and the table = 450 dollars

Price of the table = 50 dollars.

Let x be the price of 1 book.
$\therefore \text{Price of 5 books =}5\times x=5x$

So, the equation for total cost will be:
$5x+50=450$

Subtracting 50 from both sides, we get:
$\Rightarrow 5x+50-50=450-50$
$\Rightarrow 5x=400$

Now dividing both sides by 5, we get:
$\Rightarrow \frac{5x}{5}=\frac{400}{5}$
$\Rightarrow x=80$

Hence, price of 1 book = 80 dollars.