Answer:
The answer to your question is: c = a + b - d
Explanation:
aA + bB → cC + dD
c could have any number from 1 to the number necessary in order that the
equation be balanced.
For example
c + d = a + b
c = a + b - d
If a = 1; b = 3 and d = 2
then c = 1 + 3 - 2
c = 2,
etc.