Final answer:
Two-step equations and inequalities can be used to represent and solve real-world problems.
Step-by-step explanation:
In real-world problems, two-step equations and inequalities can be used to represent and solve various situations. These equations involve solving for an unknown variable by performing two operations. Here is an example:
Problem: Sarah has $20 and wants to buy a new book. The book costs $12. How much more money does Sarah need to buy the book?
Solution: Let the unknown, x, represent the additional amount of money Sarah needs. We can set up the equation: $20 - $12 = x
By solving this equation, we find that x = $8. Therefore, Sarah needs $8 more to buy the book.