1. The problem statement, all variables and given/known data The age of a mother is twice the sum of ages of her 2 sons. 5 years later the mother will be 20 years older than the sum of ages of her sons. What age is the mother today? 2. Relevant equations 3. The attempt at a solution M - mother ; S1 = son1 ; S2 = son2. S = S1 + S2. http://sketchtoy.com/18509468 Thanks.