Question:
Solve -5 = 2*q - 5 for q..

Answer:
0

Question:
Solve 101 + 13 = 19*u for u..

Answer:
6

Question:
Solve -30*a + 40*a + 271*a + 7*a = -23040 for a..

Answer:
-80

Question:
Solve -22*u + 540 = 8*u for u..

Answer:
18