To solve the equation 4r = -36, you need to isolate the variable "r" on one side of the equation. Here's how you can do it:
1. Start with the given equation: 4r = -36.
2. To isolate the variable "r," divide both sides of the equation by 4. This gives us: (4r)/4 = (-36)/4.
3. Simplify both sides of the equation: r = -9.
Therefore, the solution to the equation 4r = -36 is r = -9.