Question:
Solve -22*i - 522 = -34 + 172 for i..

Answer:
-30

Question:
Solve 3577 - 3234 = 188*n + 15947 for n..

Answer:
-83

Question:
Solve 4*r - 13 = 7 for r..

Answer:
5

Question:
Solve 4041 = 346*b - 7127 + 442 for b..

Answer:
31