Alain's mom bought 5 packs of red pens and also bought twice the amount of black pens than the red. If each pack has 5 pens, how many pens does Alain have?
Alain has a total of 5 x 5= 
<gadget id="calculator">5*5</gadget>
<output>25</output>
25 red pens.
And he has a total of 5 x 2 = 
<gadget id="calculator">5*2</gadget>
<output>10</output>
10 packs of black pens.
So, the total number of black pens he has is 10 x 5 = 
<gadget id="calculator">10*5</gadget>
<output>50</output>
50.
Therefore, the total number of pens he has is 50 + 25= 
<gadget id="calculator">50+25</gadget>
<output>75</output>
75.

<result>75</result>