Question: What is the solution?

Solve -1541*r = -1544*r + 39 for r.

Answer: 13

Question: What is the solution?

Solve -6*y + 14*y = y - 7 for y.

Answer: -1

Question: What is the solution?

Solve 4*q - 10 = -6 for q.

Answer: 1

Question: What is the solution?

Solve -25*t = -33*t + 40 for t.

Answer:
5