Question: What is the solution?

Solve 63*m - 68*m = -15 for m.

Answer: 3

Question: What is the solution?

Solve -462 + 687 = 25*k for k.

Answer: 9

Question: What is the solution?

Solve 0 = -145*y + 44*y - 94927 + 87958 for y.

Answer: -69

Question: What is the solution?

Solve -15*d + 223*d + 956 = -31*d for d.

Answer:
-4