Final answer:
To isolate m in the equation 27 = 9m - 18n, add 18n to both sides and then divide by 9, which results in m = (27 + 18n) / 9.
Step-by-step explanation:
To rearrange the equation 27 = 9m - 18n to isolate m, you want to perform operations that will leave m on one side of the equation by itself. First, you would add 18n to both sides of the equation to get 27 + 18n = 9m. Then you would divide both sides by 9 to solve for m, resulting in m = (27 + 18n) / 9. This corresponds to the first option:
m = (27 + 18n) / 9.