1. The problem statement, all variables and given/known data In each of the following the properties of a compound are given. In each case find A:B:C 1. 3/8 of A with B and C 1:2 2. A, B, C are mixed according to the ratios A:B=1:7 and B:C=13:9 2. Relevant equations 3. The attempt at a solution I just can't seem to solve these two. I got no idea where to even start. Please help.