m - 9 = 2m - 12 / 3
if we follow pemdas, we know to divide -12 by 3 first! the equation now looks like:
m - 9 = 2m - 4
the goal is to isolate M on one side, so let’s solve for that!
m - 9 = 2m - 4
+9. +9
m = 2m + 5
-2m -2m
-m = 5
since the M is negative, we need to divide it by -1 to cancel it out.
-m = 5
—————
-1. -1
Your final answer is:
m = -5