1. The problem statement, all variables and given/known data if a+11b is completely divisible by 13 and a+13b is completely divisible by 11 then find the the smallest possible value of a+b. a and b are positive integers. the answer is 28 2. Relevant equations a+11b= 13x a+13b= 11y 3. The attempt at a solution i have equated them many times but am still getting 3 variables. hope anyone knows how to solve this.