Write down the solution for this math problem: Solve 4435*a - 45924 = 51801 - 17895 for a.
answer: 18

Write down the solution for this math problem: Solve -385 = 7*k + 479 - 745 for k.
answer: -17

Write down the solution for this math problem: Solve 54*n + 52*n - 12 = 103*n for n.
answer: 4

Write down the solution for this math problem: Solve -4 = 1648*r - 1652*r for r.
answer:
1