Question:
Solve -2*c + 0*c + 3*c = -15 for c..

Answer:
-15

Question:
Solve -43 - 113 = -26*h for h..

Answer:
6

Question:
Solve -5*v + 112 = 132 for v..

Answer:
-4

Question:
Solve 0 = 23*l + 8*l for l..

Answer:
0