What is reasonable first step that can be used to solve the equation 2(x+6)=3(x-4)+5?

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Carl's candies has determined that a candy bar measuring 3 inches long has a z-score of +1 and a candy bar measuring 3.75 inches long has a z-score of +2. what is the standard deviation of the length of candy bars produced at carl's candies?

Find two numbers if their sum is 91 and the ratio is 6: 7?