Problem: the total age of a and b is 18 years more than the total age of b and c . c is how many year younger than
Rationale: "given that a + b = 182 + b + c = > a â € “ c = 18 + b â € “ b = 18 = > c is younger than a by 18 years answer : e"
annotated_formula: multiply(18, const_1)