Question: What is the solution?

Solve 861 = 317*j - 2648 - 3148 for j.

Answer: 21

Question: What is the solution?

Solve 230 + 7 = 51*m - 18 for m.

Answer: 5

Question: What is the solution?

Solve -745*x + 2623 + 18 - 1207 = -3781 for x.

Answer: 7

Question: What is the solution?

Solve 23*c = 46*c + 23 for c.

Answer:
-1