Question: What is the solution?

Solve -72*u + 2648 = -115*u + 670 for u.

Answer: -46

Question: What is the solution?

Solve -37*j + 6 = 43 for j.

Answer: -1

Question: What is the solution?

Solve -41*b + 3*b = 342 for b.

Answer: -9

Question: What is the solution?

Solve -102*j - 9 = 297*j + 1188 for j.

Answer:
-3