dan ' s age after 18 years will be 5 times his age 6 years ago . what is the present age of dan ?
"let dan ' s present age be x . x + 18 = 5 ( x - 6 ) 4 x = 48 x = 12 the answer is c ."
divide(add(18, multiply(6, 5)), subtract(5, const_1))