Question:
Solve -343 = -61*a + 145 for a..

Answer:
8

Question:
Solve -14*x - 72 = 10*x for x..

Answer:
-3

Question:
Solve 0 = 193*f - 4*f + 38*f - 2724 for f..

Answer:
12

Question:
Solve -24*o - 290 = 34*o for o..

Answer:
-5