dan ' s age after 18 years will be 8 times his age 3 years ago . what is the present age of dan ?
"let dan ' s present age be x . x + 18 = 8 ( x - 3 ) 7 x = 42 x = 6 the answer is b ."
divide(add(18, multiply(3, 8)), subtract(8, const_1))