It seems like you might have started an equation and didn't finish it. If you're trying to solve for \( a \) in the equation \( -72 = 12a \), here's how to proceed:

### Steps:
1. To isolate \( a \), divide both sides of the equation by 12:
   \[
   \frac{-72}{12} = a
   \]
2. Simplify the division:
   \[
   -6 = a
   \]

So, the solution is \( a = -6 \).

If you had something else in mind with the unfinished part, feel free to clarify!

Would you like more details or have any questions?

Here are some related questions:

1. How do you solve the equation \( -72 = 12a \) using another method?
2. What does the solution \( a = -6 \) represent in the context of this equation?
3. Can you solve a similar equation, like \( -72 = -12a \)?
4. What is the impact of dividing both sides of an equation by a positive number?
5. How would you solve the equation if it were \( -72 = 12a + b \) instead?
6. What if the equation was \( -72 = 12a - c \)? How would that change the solution?
7. How do you verify that \( a = -6 \) is the correct solution to the equation?
8. Can you create a word problem that would require solving the equation \( -72 = 12a \)?

**Tip:** When dividing both sides of an equation by a number, make sure the number isn't zero, as division by zero is undefined.

Learn how to solve the equation -72 = 12a with a detailed step-by-step solution. This problem involves isolating the variable a in a linear equation, dividing both sides by 12, and understanding the impact of division in solving equations. Suitable for students in Grades 7-9.

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