Question:
Solve -646*c + 1451*c + 18515 = 0 for c..

Answer:
-23

Question:
Solve -13 = 443*y + 3109 + 3999 + 6612 for y..

Answer:
-31

Question:
Solve -227 = 51*a + 74 + 311 for a..

Answer:
-12

Question:
Solve 10 = 19*y - 9 for y..

Answer:
1