Question 13370
First of all, you need to do the distributive property as many times as necessary to get rid of parentheses. By doing this, you will get:

{{{2(k-12+6k)=2k-6+3}}}
{{{2k-24+12k = 2k-6+3}}}

Now that you have that, add like terms to get {{{14k-24 = 2k-3}}}.

Move everything with a k to one side of the equal sign and everything without a k to the other side of the equal sign to get {{{12k = 21}}}.  Divide by 12 to get {{{k=(21/12)}}}.