Problem: the sum of present age of abe and the age before 7 years is 33 . find the present age of abe . what will be his age after 7 years ?
Rationale: "present age = x before 7 yrs , y = x - 7 after 7 yrs , z = x + 7 by the qn , x + ( x - 7 ) = 33 2 x - 7 = 33 2 x = 33 + 7 x = 40 / 2 x = 20 z = x + 7 = 20 + 7 = 27 answer : c"
annotated_formula: add(divide(add(33, 7), const_2), 7)