Johnny plans to buy a pencil for each of his 21 students. there are six pencils in each package. how many packages must he buy?

Hi!

So we need to know how many times 6 goes into 21.

6, 12, 18, 24

6 doesn't go into 21 evenly, so Johnny will have to pick between buying 18 pencils, or 24 pencils.

If Johnny buys 3 packages, 3 students won't have any pencils. Which means Johnny has to buy 4 packages.

Hope this helps! :)

-Peredhel

45

step-by-step explanation:

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0