I honestly don’t understand this ::))

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

The sum of two numbers is 86, and their difference is 20. find the two numbers

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits