Let's solve the problem step-by-step.
First, let's find out how many business envelopes Leon packs. We know that he packs 30 business envelopes in each box and he has 25 such boxes. To find the total number of business envelopes, we multiply the number of envelopes in each box by the number of boxes:
[tex]\[ \text{Total business envelopes} = 30 \text{ envelopes/box} \times 25 \text{ boxes} = 750 \text{ envelopes} \][/tex]
Next, we do the same for the regular envelopes. He packs 30 regular envelopes in each box and he has 20 boxes of these. Again, to find the total number, we multiply the number of envelopes per box by the number of boxes:
[tex]\[ \text{Total regular envelopes} = 30 \text{ envelopes/box} \times 20 \text{ boxes} = 600 \text{ envelopes} \][/tex]
Now, to find out the total number of envelopes Leon packs, we add the total number of business envelopes to the total number of regular envelopes:
[tex]\[ \text{Total envelopes} = \text{Total business envelopes} + \text{Total regular envelopes} \][/tex]
[tex]\[ \text{Total envelopes} = 750 \text{ envelopes} + 600 \text{ envelopes} \][/tex]
[tex]\[ \text{Total envelopes} = 1350 \text{ envelopes} \][/tex]
Therefore, Leon packs a total of 1350 envelopes.
