If 9^{x \plus{} 2} \equal{} 240 \plus{} 9^x, then the value of x is:
<spanclass=′latex−bold′>(A)</span>0.1<spanclass=′latex−bold′>(B)</span>0.2<spanclass=′latex−bold′>(C)</span>0.3<spanclass=′latex−bold′>(D)</span>0.4<spanclass=′latex−bold′>(E)</span>0.5