Question:
Solve -6*a + 30 = 24*a + 210 for a..

Answer:
-6

Question:
Solve 8*k + 62 = -2 for k..

Answer:
-8

Question:
Solve 3*g = 2*g for g..

Answer:
0

Question:
Solve -85*x - 54 = -70*x - 21*x for x..

Answer:
9