HELP HELP PLS MUCH LOVE REMEMBER I NEED THE INEQUALITY RULE

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. !

Justin has 750 more than eva and eva has 12 less than justin together they have a total of 63 how much money did

Erik buys 2.5 pounds of cashews. if each pound of cashews costs $7.70, how much will he pay for the cashews?