a)

To solve the equation , you first want to get all the terms involving on one side. Subtract from both sides to get , which simplifies to . Now, dividing both sides by 2 gives you . Easy peasy!

This equation is a classic example of a linear equation—a fundamental concept in algebra! Linear equations can represent various real-world situations, such as budgeting or predicting sales, where you need to determine an unknown quantity based on given information. Understanding how to manipulate them can be useful in countless scenarios!