Question: What is the solution?

Solve 3 = -7*r - 18 for r.

Answer: -3

Question: What is the solution?

Solve 0 = 5*y - 9 + 14 for y.

Answer: -1

Question: What is the solution?

Solve -51*a + 312*a - 1369 - 197 = 0 for a.

Answer: 6

Question: What is the solution?

Solve -67*j + 296 + 1204 = -41 for j.

Answer:
23