Question: What is the solution?

Solve -875*d - 47*d = 1074 + 770 for d.

Answer: -2

Question: What is the solution?

Solve 7*r + 12 - 47 = 0 for r.

Answer: 5

Question: What is the solution?

Solve -1783*s + 169*s - 950*s - 164096 = 0 for s.

Answer: -64

Question: What is the solution?

Solve -8*j = 7 + 1 for j.

Answer:
-1