Write down the solution for this math problem: Solve 1649*d - 1314*d = -12730 for d.
answer: -38

Write down the solution for this math problem: Solve 2350 = -654*i + 1371*i - 670*i for i.
answer: 50

Write down the solution for this math problem: Solve 324*i - 175*i + 538 = -207 for i.
answer: -5

Write down the solution for this math problem: Solve -4*m - 44 = -44 for m.
answer:
0