Pizzazz Publications is having some books printed. The printer charges $800 plus $5 per book. What equation could help me find how many books can be printed for $4,000?

800 + 5x = 4000
800 + 5 = 4000
4000 = 800 + 5
4000 + 5х= 800
800x + 5 = 4000

1 answer

To find how many books can be printed for $4,000, you need to use an equation that correctly represents the total cost based on the given pricing structure.

The cost structure is:

  • A fixed charge of $800.
  • A variable charge of $5 per book, which we'll represent as \( x \) (the number of books).

The correct equation is:

\[ 800 + 5x = 4000 \]

So the first option you provided is the correct equation to solve for \( x \) (the number of books). The other options are not correct formulations for this scenario.

To find the number of books, you would solve the equation:

  1. Subtract $800 from both sides: \[ 5x = 4000 - 800 \] \[ 5x = 3200 \]

  2. Divide by 5: \[ x = \frac{3200}{5} \] \[ x = 640 \]

Thus, Pizzazz Publications can print 640 books for $4,000.