You have $2 and earn $0.50 for each cup of lemonade you sell. write an equation in two variables that represents the total amount aa (in dollars) you have after selling cc cups of lemonade.
what is a?

So because you will have $2 no matter how many cups you sell the equation starts off as AA = 2 

Next, you add the dependent variable, because 1 cup of cc = $0.50 you add 0.5cc to the equation (it can also be written as 1/2cc), to complete the equation.
AA = 1/2cc +2

He secknd step was the answer to them

If there are four friends then each would get, 1.25 or 1 1/4. so this is how i solved 5 ÷ 4 = 1.25 . hope this ; )