Write down the solution for this math problem: Solve 3*k + 13 = -10*k for k.
answer: -1

Write down the solution for this math problem: Solve -526 - 174 = 70*j for j.
answer: -10

Write down the solution for this math problem: Solve 1404*u + 1427*u - 2933*u = -1938 for u.
answer: 19

Write down the solution for this math problem: Solve -221*o + 887*o + 34914 + 27253 = 21541 for o.
answer:
-61