Write down the solution for this math problem: Solve -195*k + 3771 = 187*k + 37*k for k.
answer: 9

Write down the solution for this math problem: Solve 1298 = 9*d - 44*d + 127*d - 33*d for d.
answer: 22

Write down the solution for this math problem: Solve 453 = 132*k + 1509 for k.
answer: -8

Write down the solution for this math problem: Solve -21*x + 0*x = -84 for x.
answer:
4