There are 12 ordered pairs of integers (x,y) that satisfy x^2 + y^2 = 25. What is the sum of all the x-values?
For each value of $x,$ there is a negative value of $x.$ So, the answer to this problem is $\boxed0$
The answer is stated in the question !! There are 12 pairs as follows:
x y
0 -5 -3 -4 3 -4 -4 -3 4 -3 -5 0 5 0 -4 3 4 3 -3 4 3 4 0 5
+592 
