Write down the solution for this math problem: Solve 0*d = 7*d for d.
answer: 0

Write down the solution for this math problem: Solve -4 = -9*t - 49 for t.
answer: -5

Write down the solution for this math problem: Solve -635*l + 297*l - 2415 = -303*l for l.
answer: -69

Write down the solution for this math problem: Solve 56 = 37*n - 29*n for n.
answer:
7