Issac has to buy pens and pencils for the upcoming school year. Issac buys 108 writing utensils total. He buys 12 more than 5 times the number of pencils than pens. How many pens did Issac buy?
Let x be the number of pens bought
He bought 12+5x pencils
x+(12+5x)=108
6x+12=108
6x=96
x=<<16=16>>16 pens
#### 16