Write down the solution for this math problem: Solve 978*w + 207 = 955*w for w.
answer: -9

Write down the solution for this math problem: Solve 424*i = 307*i - 1287 for i.
answer: -11

Write down the solution for this math problem: Solve -3749*j = -3778*j + 3132 for j.
answer: 108

Write down the solution for this math problem: Solve -13*k = -320 + 99 for k.
answer:
17