a)

To solve for , simply add 10 to both sides of the equation:

So, ! That was a smooth little operation.

Now, imagine you’re solving an equation like this in a real-life scenario, such as figuring out how many items you need to buy to reach a certain total. If you know you have 10 items and want to reach 45 items total, you quickly figure out that you need 55 items. Math isn’t just numbers—it’s everywhere in everyday life!