(15) \( u \div 8=12 \)

To solve for \( u \), you can simply multiply both sides of the equation by 8. So, \( u = 12 \times 8 \). This gives us \( u = 96 \). Such a technique is widely used in solving linear equations, where you isolate the variable on one side. In real-life situations, knowing how to manipulate equations like this comes in handy! For instance, if you’re calculating the number of items each person can carry in a group, being able to set up and solve such divisions makes planning a trip more efficient. Now, who doesn’t want that?