If 45-[28-{37-(15-*)}]= 57, then * is equal to:  Pick:
A) -29  B) -19  C) 18  D) 29  E) 39
45-[28-{37-(15-*)}]= 57 =&gt; 45-[28-{37-15+*}]=57   45-[28-37+15-*]=57 =&gt; 45[43-37-*]=57   45-[6-*]=57 =&gt; 45-6+*=57   39+*=57 =&gt; *=57-39= 
<gadget id="calculator">57-39</gadget>
<output>18</output>
18   ANSWER:18
<result>C</result>
If 45-[28-{37-(15-*)}]= 57, then * is equal to: