Question:
Solve 10*n - 11 = 39 for n..

Answer:
5

Question:
Solve 60 = -13*q - 2*q for q..

Answer:
-4

Question:
Solve -22*k - 17*k + 205 = 2*k for k..

Answer:
5

Question:
Solve 1767*a = 1790*a + 207 for a..

Answer:
-9