Write down the solution for this math problem: Solve -80*n = -51*n - 174 for n.
answer: 6

Write down the solution for this math problem: Solve -622*j - 19152 = -841*j + 946*j + 869*j for j.
answer: -12

Write down the solution for this math problem: Solve -309 - 939 = 78*y for y.
answer: -16

Write down the solution for this math problem: Solve -6156*s + 6225*s = -2139 for s.
answer:
-31