Question: What is the solution?

Solve 4 = -3*q + 19 for q.

Answer: 5

Question: What is the solution?

Solve -4*d = -91*d + 1525 - 220 for d.

Answer: 15

Question: What is the solution?

Solve 91*d - 89*d = -10 for d.

Answer: -5

Question: What is the solution?

Solve -10*y = -2 + 52 for y.

Answer:
-5