Sorry I know that's totally confusing!
Ok...
Any number with C is one part remedy/100 parts water for 1C. 2C would be to take one part of that mixture and mix it with 100 parts water (or alcohol). X uses the ration 1:10
So 6c is 1 part remedy 100 parts water, take one part that/100 parts water....6 times. So the ration is 1:10 to the power of 12.
30x would be 1:10 to the power of 29
So therefore 30x is more diluted and has less remedy
And 30x is stronger
Clear as mud?