\( 31 \Rightarrow 3 ( 7 \times 3 - 12 ) = \)

To solve the expression, we start with the part inside the parentheses: \( 7 \times 3 - 12 \). First, calculate \( 7 \times 3 = 21\). Then, \( 21 - 12 = 9\). Now we replace the parentheses with 9 in the original expression, which becomes \( 3 (9) \). Finally, \( 3 \times 9 = 27\). Therefore, the entire expression evaluates to 27! Want to know what real-world scenarios use such calculations? Well, you often find similar expressions in budget calculations, where you may need to adjust expenses by factoring in discounts or changes in quantities. You're not just crunching numbers; you're planning your finances wisely! Also, don't forget about equations like these in coding and programming! When you create algorithms, especially for tasks involving statistics or game programming, you're constantly breaking down complex equations into manageable parts. Understanding how to simplify can save you hours of debugging!