Question: What is the solution?

Solve -54*i = 43*i - 41*i - 840 for i.

Answer: 15

Question: What is the solution?

Solve 292*s + 283*s - 511*s + 1600 = 0 for s.

Answer: -25

Question: What is the solution?

Solve -8*t - 13 - 11 = 0 for t.

Answer: -3

Question: What is the solution?

Solve 43*z - 2898 = 238*z + 12*z for z.

Answer:
-14