Question:
Solve -2*x = -30 + 34 for x..

Answer:
-2

Question:
Solve 90 = -13*n - 105 for n..

Answer:
-15

Question:
Solve -5920 + 608 = 261*t - 875 for t..

Answer:
-17

Question:
Solve 0 = 1134*s + 11*s - 62975 for s..

Answer:
55