Answer:
c = -6
Step-by-step explanation:
[tex]3(c - 2) = 2(c - 6)[/tex]
[tex]3c - 6 = 2c - 12[/tex]
[tex]3c - 2c = - 12 + 6[/tex]
[tex]\boxed{\green{c = - 6}}[/tex]