Write down the solution for this math problem: Solve 26 = -7*k + 19 for k.
answer: -1

Write down the solution for this math problem: Solve 475*b = 857*b + 9550 for b.
answer: -25

Write down the solution for this math problem: Solve 92 = -349*i + 331*i - 70 for i.
answer: -9

Write down the solution for this math problem: Solve 17*d - 86 = -1 for d.
answer:
5