Can anyone answer this question for me ?

I'll give brainliest if you answer right : )

Leo has b boxes of pencils. each box contains 6 pencils. he has a total of 42 pencils. the equation that represents this situation the value of b that makes the equation true the first one is b+6=42,6b=42,b=42+6,or 42b=6 the second one are 7,836 48

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.