To solve the equation \( 25.4 + X = -20.3 \), you need to isolate \( X \).
- Subtract \( 25.4 \) from both sides of the equation:
\[ X = -20.3 - 25.4 \]
- Now, calculate the right side:
\[ -20.3 - 25.4 = -45.7 \]
So, \( X = -45.7 \).
Thus, you can fill in the blanks as follows:
\[ 25.4 + \text{(blank)} = \text{(blank)} \implies 25.4 + (-45.7) = -20.3 \]
So the complete equation is:
\[ 25.4 + (-45.7) = -20.3 \]