Question:
Solve 0 = 2079*r - 1982*r + 194 for r..

Answer:
-2

Question:
Solve -64 = 61*n - 29*n for n..

Answer:
-2

Question:
Solve 13*n = 2774 - 2813 for n..

Answer:
-3

Question:
Solve -33 = -22*l - 121 for l..

Answer:
-4