Question:
Solve -35*a + 113 = -46 + 89 for a..

Answer:
2

Question:
Solve 20 = -24*o + 20*o for o..

Answer:
-5

Question:
Solve -13 + 120 = 194*c - 183 - 98 for c..

Answer:
2

Question:
Solve 2518 + 195 + 1738 = 80*a - 749 for a..

Answer:
65