Question

1. $-2am = 1$, for $a$

Explanation:

Step1: Isolate term with $a$

Divide both sides by $-2m$
$$\frac{-2am}{-2m} = \frac{1}{-2m}$$

Step2: Simplify to solve for $a$

Cancel common factors on left side
$$a = -\frac{1}{2m}$$

Answer:

$a = -\frac{1}{2m}$