Question:
Solve -67*a = -21*a + 46 for a..

Answer:
-1

Question:
Solve -825*c = 688*c - 470*c + 51164 + 12459 for c..

Answer:
-61

Question:
Solve 0 = 25*c - 27*c - 10 for c..

Answer:
-5

Question:
Solve 53*j - 177 = -143 + 735 + 768 for j..

Answer:
29