Question:
Solve 644476 = -64*s + 643196 for s..

Answer:
-20

Question:
Solve -14*c - 64 = 46 + 16 for c..

Answer:
-9

Question:
Solve -2287*p = -2325*p + 380 for p..

Answer:
10

Question:
Solve 13*a - 803 = 117*a + 757 for a..

Answer:
-15