Someone please help me.

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

Adiverr from the university of florida women’s swimming and diving team is competing in the ncaa zone b championships

What’s the answer ? use the picture to see the problem