Question: What is the solution?

Solve 16 = -9*d + d for d.

Answer: -2

Question: What is the solution?

Solve -281*l - 312 = -229*l for l.

Answer: -6

Question: What is the solution?

Solve 67*j = 66*j - 4 for j.

Answer: -4

Question: What is the solution?

Solve -27*n = -20*n - 7 for n.

Answer:
1