Write down the solution for this math problem: Solve -45*k - 9 = 621 for k.
answer: -14

Write down the solution for this math problem: Solve 307 = 184*l + 123*l for l.
answer: 1

Write down the solution for this math problem: Solve 7*u = -11*u + 10*u for u.
answer: 0

Write down the solution for this math problem: Solve 1262*p - 15751 = 3179 for p.
answer:
15