if a ( a - 6 ) = 27 and b ( b - 6 ) = 27 , where a ≠ b , then a + b = ?
"i . e . if a = - 3 then b = 9 or if a = 9 then b = - 3 but in each case a + b = - 3 + 9 = 6 answer : option d"
subtract(subtract(subtract(subtract(add(add(6, 27), subtract(6, 27)), const_1), const_1), const_1), const_1)