Question:
Solve 0 = 58*w - 28*w + 180 for w..

Answer:
-6

Question:
Solve -2386*r + 2500*r + 2508 = 0 for r..

Answer:
-22

Question:
Solve -208 = -12*o + 38*o for o..

Answer:
-8

Question:
Solve -273*w - 586 + 1234 + 624 = -591*w for w..

Answer:
-4