Write down the solution for this math problem: Solve 7*k - 108 = 194 - 253 for k.
answer: 7

Write down the solution for this math problem: Solve -420*k + 2330*k - 2065 = -19255 for k.
answer: -9

Write down the solution for this math problem: Solve -37*a = -93*a + 38*a - 18 for a.
answer: -1

Write down the solution for this math problem: Solve -101*n + 89*n + 60 = 0 for n.
answer:
5