Answer:
c=99
Explanation:
Im assuming you mean 12 + (1/3c) - 36 = 9 in which case c=99 you can isolate c by combining 12 and -36, creating -24 and adding 24 on both sides making 1/3c=33, then multiplying both sides by 3 making c=99
and not
1) (12+1)/(3c-36)=9 ; c=12.48 or 12+13/27
2) (12+1)/3c -36=0; c=0.09629