Question 241864
First, let's isolate c.
{{{c-2/12=3/9}}}
{{{c=(3/9)+(2/12)}}}
Now, let's ask ourselves if we can simplify each fraction.  Yes, we can.  So the equation now becomes:
{{{c=(1/3)+(1/6)}}}
Now let's find the LCD to be able to combine these fractions.
{{{c=(1/3)(6/6)+(1/6)(3/3)}}}
{{{c=(6/18)+(3/18)}}} ...same as... {{{c=(6+3)/18}}}
{{{c=9/18}}}
Can we simplify it further?  Yes, so the equation now becomes:
{{{c=1/2}}}
.
Done!  :)