Question:
Solve 18*a = 2*a - 14380 + 14844 for a..

Answer:
29

Question:
Solve -1544 = -780*c + 796 for c..

Answer:
3

Question:
Solve -38*a + 219 = 447 for a..

Answer:
-6

Question:
Solve 703 = 42*a + 15 - 68 for a..

Answer:
18