Question: What is the solution?

Solve -45*r + 46*r = 7 for r.

Answer: 7

Question: What is the solution?

Solve 0 = 1292*b - 2218*b - 1961*b - 251169 for b.

Answer: -87

Question: What is the solution?

Solve 5183 - 37823 = -1266*k + 798 + 13404 for k.

Answer: 37

Question: What is the solution?

Solve 0 = 19640*b - 19693*b - 1484 for b.

Answer:
-28