To solve the equation \(-8.7 + (-4.62)\), we need to add the two numbers together.
Convert to Addition: \(-8.7 + (-4.62)\) is the same as \(-8.7 - 4.62\).
Perform the Addition: \[ -8.7 - 4.62 = -8.7 - 4.62 = -(8.7 + 4.62) \]
Add the Absolute Values: \[ 8.7 + 4.62 = 13.32 \]
Apply the Negative Sign: Therefore, \(-8.7 - 4.62 = -13.32\).
The final answer is: \[ -13.32 \]