Question: What is the solution?

Solve -15 = 25*d + 10 for d.

Answer: -1

Question: What is the solution?

Solve -367 + 31 - 71 = -37*a for a.

Answer: 11

Question: What is the solution?

Solve 5*j = -7 + 12 for j.

Answer: 1

Question: What is the solution?

Solve -261*x + 290*x - 7 = -65 for x.

Answer:
-2