Question:
Solve -7489*n - 5739*n - 203805 = 359*n for n..

Answer:
-15

Question:
Solve -6 = -509*c + 511*c for c..

Answer:
-3

Question:
Solve -696 = -6*i - 738 for i..

Answer:
-7

Question:
Solve 0 = -2*d - 11 + 13 for d..

Answer:
1