To solve for "a" using the formula "z=b+m/a", follow these steps:
Isolate "a" on one side of the equation:
z - b = m/a
Multiply both sides by "a" to get "a" alone on one side of the equation:
a(z - b) = m
Divide both sides by "z - b" and get "a" alone on the left side of the equation:
a = m/(z - b)