Q: What is the solution?
Solve -20 = -863*a + 859*a for a.

A: 5

Q: What is the solution?
Solve 39*k + 21 = 21 for k.

A: 0

Q: What is the solution?
Solve -145*g - 266 = -312*g + 153*g for g.

A:
19