given that a+b=c, a+c=d, and b=c+d where d is a positive integer what is the greatest value of a
I know Cphill already answered this, however, I was looking for a numerical value for a.
Using CPhill's answer:
a = -d
but d is a positive integer, so minimum value of d is 1;
so maximum value of a = -d <-- so a = -1