Question 638145
To solve for c, you have to get c all by itself on the left side of your equal sign.  To do that, you would do the opposite of what is being done on the left side, to both sides.  Since c is being divided by 4, we would multiply both sides by 4:

{{{c/4=-9}}}=

{{{4*(c/4)=-9*4}}}

When you multiply an entire fraction by the denominator of that fraction, the denominator of your fraction goes away, leaving you with just the numerator.  So, in this case, the 4 would go away, leaving you with c on the left side, and -9 x 4 on the right side.  Just multiply -9 x 4 and you will have your answer:

{{{c=-36}}}