360 miles traveled on 12 gallons of gasoline

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

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

Math it's appreciated. (picture provided)