(4300331)-?=2535618
Options.
A) 1865113  B) 1775123  C) 1764713  D) 1675123  E) None of them
Let 4300331-x=2535618   then x=4300331-2535618= 
<gadget id="calculator">4300331-2535618</gadget>
<output>1_764_713</output>
1764713   Answer is 1764713
<result>C</result>
(4300331)-?=2535618