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
The Attempt at a Solution
I just can't seem to solve these two. I got no idea where to even start. Please help.