by tommywallach Sat Dec 06, 2014 4:28 pm
For the integers a,b,c, the sum of a and b is 75% of c
Col A : (3/4) (a+b)
Col B : (4/3) (c)
a + b = .75c
You know, you could do the algebra here to create the columns (i.e. multiply both sides by 3/4, to create Column A), but yeah, I think I'd just think about it logically.
A = 1
B = -1
C = 0
A = 0
B= 0
C = 0
And (D) is proven. There are no constraints other than the ones given in the common information (all variables must be integers), so we're safe with negatives and 0.
-t