In Excel create an efficient formula using Sum and Absolute references that calculates the % of Total 2-year World Sales for USA for each year

Create a real-life situation and create a system and show how it might be modeled algebraically with a system of equations (or inequalities) show all work include a few sentences explaining the situation, your variables of choice and what each represents, and how you would set it up and solve it algebraically. !

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10