Write down the solution for this math problem: Solve 590 + 138 = 29*u + 90 for u.
answer: 22

Write down the solution for this math problem: Solve 0 = -135*a + 571*a - 872 for a.
answer: 2

Write down the solution for this math problem: Solve 24*k - 122*k + 1296 - 316 = 0 for k.
answer: 10

Write down the solution for this math problem: Solve -151 = -16*v - 58 + 67 for v.
answer:
10