Question

aladdin had two envelopes to start. He bought three packs of
envelopes. Each pack had the same number of envelopes. Aladdin now has 17 envelopes.

Write an equation to find the number of envelopes in each pack.
State what the variable represents.

Answer 1

Since it starts with 2 envelopes, subtract 2 from 17 to get how many and in all 3 packs.
17 - 2 = 15
Now, we divide that number by 3 to get how many are in each envelope.
15 / 3 = 5
There are 5 envelopes in each pack.