\( x + 4 = - 15 \quad \square \)

To solve the equation \(x + 4 = -15\), you need to isolate \(x\). Start by subtracting 4 from both sides: \(x = -15 - 4\). So, \(x = -19\). Voila! You found the value of \(x\). Ever wondered how this applies in real life? Solving equations like this can help in budgeting. If you know your total expenses (like -15 dollars in debt) and your fixed costs (the 4 dollars you need to pay), you can find out exactly how much money you need to scrape up from your savings (in this case, 19 dollars). It's all about balancing your budget!