To solve the equation \( 30 = -\frac{5}{8}u \), follow these steps:

1. **Isolate \( u \)**:  
   Start by multiplying both sides of the equation by the reciprocal of \(-\frac{5}{8}\), which is \(-\frac{8}{5}\).

   \[
   u = 30 \times \left(-\frac{8}{5}\right)
   \]

2. **Simplify the multiplication**:
   \[
   u = 30 \times -\frac{8}{5} = -\frac{240}{5} = -48
   \]

So, the solution is \( u = -48 \).

Would you like any further details or have any questions?

Here are five related questions you might find useful:
1. How do you solve an equation involving fractions?
2. What happens when you multiply or divide both sides of an equation by a negative number?
3. Can you solve the equation \( -2 = \frac{3}{4}x \) for \( x \)?
4. How do you interpret the solution to a linear equation in a real-world context?
5. What is the importance of checking your solution in the original equation?

**Tip:** Always simplify fractions and negative signs carefully to avoid mistakes in your calculations.

Learn how to solve the equation 30 = -5/8u step-by-step with clear explanations and calculations. This problem involves solving equations with fractions and multiplication. Suitable for students in Grades 6-8.

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