To rewrite the equation \(5b = 10\) as two equations joined by "and," you can express it as follows:
\(5b = 10\) and \(b \neq 0\).
(Note: The second part, \(b \neq 0\), is added to indicate that \(b\) cannot be zero, but strictly speaking, for the equation \(5b = 10\), there are no further restrictions beyond what's defined by the equation itself.)