Question:
Solve -9*n + 235 = 199 for n..

Answer:
4

Question:
Solve 278 - 53 = -45*d for d..

Answer:
-5

Question:
Solve 510 - 26110 = 1024*m for m..

Answer:
-25

Question:
Solve 281*o + 282*o = 423*o - 5320 for o..

Answer:
-38