what is the sum of all possible solutions to | x - 5 | ^ 2 + | x - 5 | = 20 ?
"denote | x - 5 | as y : y ^ 2 + y = 20 - - > y = - 5 or y = 4 . discard the first solution since y = | x - 5 | , so it ' s an absolute value and thus can not be negative . y = | x - 5 | = 4 - - > x = 9 or x = - 1 . the sum = 10 answer : d ."
add(add(const_4, 5), subtract(5, const_4))