Answer
The water level of the reservoir at the end of five months is $23$ $feet$.
Work Step by Step
For this word problem, you go step-by-step by adding and subtracting from an initial value. Your initial value is $25$ $feet$, from which you subtract $3$ $feet$ because the water level fell $3$ $feet$:
$25$ $feet - 3$ $feet$
The next step, you add $2$ $feet$ because the water level rose $2$ $feet$.
$25$ $feet - 3$ $feet$ + $2$ $feet$
The water level rose another $1$ $foot$, so you add $1$ $foot$:
$25$ $feet - 3$ $feet$ + $2$ $feet$ + $1$ $feet$
Then you subtract $4$ $feet$ because the water level fell by that much:
$25$ $feet - 3$ $feet$ + $2$ $feet$ + $1$ $feet$ - $4$ $feet$
Finally, the reservoir rose $2$ $feet$, so you have the following final expression:
$25$ $feet - 3$ $feet$ + $2$ $feet$ + $1$ $feet$ - $4$ $feet$ + $2$ $feet$
$23$ $feet$ is your answer if you add from left to right according to the order of operations.
