AMC 12 2002a Problem 2

Cindy was asked by her teacher to subtract 3 from a certain number and then divide the result by 9. Instead, she subtracted 9 and then divided the result by 3, giving an answer of 43. What would her answer have been had she worked the problem correctly?

$\mathrm{(A) \ } 15 \mathrm{(B) \ } 34 \mathrm{(C) \ } 43 \mathrm{(D) \ } 51 \mathrm{(E) \ } 138$