1. The problem is to determine if the value of $a$ can be 58 based on given conditions or equations. 2. To decide if $a=58$ is possible, we need the specific equation or context where $a$ appears. 3. Without an equation or condition, we cannot confirm or deny $a=58$. 4. If you provide the equation or problem statement involving $a$, I can help determine if $a=58$ is valid.