Write down the solution for this math problem: Solve -30*t + 31 - 6 + 35 = 0 for t.
answer: 2

Write down the solution for this math problem: Solve -7*k + 7 + 0 = 0 for k.
answer: 1

Write down the solution for this math problem: Solve 0 = -7*w + 3*w - 14*w + 126 for w.
answer: 7

Write down the solution for this math problem: Solve -3617 + 1031 - 4860 = -95*u + 439 for u.
answer:
83