I am translating a mathematical paper into English and I'm having trouble with this passage. What I wrote was:
"Comparing Equation A and Equation B, for example, for n=12 we note that the coefficient of X in Equation A tells us that there exist 15 matrices whose sum of its entries is 12 and whose respective weights can be 1 or -1..."
Specifically, my trouble is: I want to say that for each matrix the sum of the entries is 12 and not that the sum of the entries of all matrices is 12. Can it be inferred from what I wrote? If not, what would be a better way to write this? Also, I'm trying to modify the structure of the text in the original language as little as possible.