How do I simplify this?

Asap 25 pts brainliest to right best/answer

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

Shannon drove for 540 minutes. if she traveled 65 miles per hour,how many total miles did she travel?