Write down the solution for this math problem: Solve 201*q - 6 = 199*q for q.
answer: 3

Write down the solution for this math problem: Solve 45684 + 32389 = -843*k - 265*k + 21565 for k.
answer: -51

Write down the solution for this math problem: Solve -9*k = -16*k - 21 for k.
answer: -3

Write down the solution for this math problem: Solve 10*c + 12 = 7*c for c.
answer:
-4