Question: What is the solution?

Solve 9 = 19*i - 16*i for i.

Answer: 3

Question: What is the solution?

Solve -25*d + 7*d + 108 = 0 for d.

Answer: 6

Question: What is the solution?

Solve 4*y + 26 = -2 for y.

Answer: -7

Question: What is the solution?

Solve -4*y = 2 - 6 for y.

Answer:
1