To find the water level \( w \) of the dam last month, we can set up an equation based on the information given. We know that the water level decreased by 8.8 meters last month and that the current water level is 95.3 meters.
The equation representing the water level last month can be written as:
\[ w - 8.8 = 95.3 \]
To find the water level last month (\( w \)), we can solve for \( w \) by adding 8.8 to both sides of the equation:
\[ w = 95.3 + 8.8 \]
Calculating that:
\[ w = 104.1 \text{ meters} \]
So, the water level last month was 104.1 meters.