jlstiles455 wrote:
I'm a bit confused by the last part "d=12b−6b=6b." How did you get 12b and 6b?
Hi,
If you are referring to Bunuel's explanation above. Note that from 4(b+c) =12(b-c) = d, we get 8b= 16c= d, and b=2c or c=b/2= 0.5b
Then If you substitute c for b, you had get d= 12(b-0.5b) = 4(b+0.5b) = 6b.
Best,
