Answer:
k =3
Explanation:
[tex]-12 = 3 - 2k - 3k\\\\\mathrm{Switch\:sides}\\3-2k-3k=-12\\\\\mathrm{Add\:similar\:elements:}\:-2k-3k=-5k\\3-5k=-12\\\\Collect\:like \:terms \:and \:simplify\\-5k = -12-3\\-5k =-15\\\\\mathrm{Divide\:both\:sides\:by\:}-5\\\frac{-5k}{-5}=\frac{-15}{-5}\\\\Simplify\\\\k =3[/tex]
