if the expression is (x + yi) + (4 + 9) = 9 -4i x+13=9-----------> x=9-13-------------> x=-4 yi=-4i----------- > y=-4
the solution is x=-4 y=-4
if the expression has a typing error and it is really (x + yi) + (4 + 9i) = 9 -4i then x+4=9------------> x=9-4-------< x=5 y+9=-4-------------> y=-4-9 ------------> y=-13 the solution is x=5 y=-13
