Solve -a + 5*a = 20 for a.
5
Solve -10 = -3*f - 1 for f.
3
Solve -473*r - 12 = -471*r for r.
-6
Solve -12*z = -30 - 6 for z.
3
Solve -95 + 116 = 7*o for o.
3
Solve 108*g - 117*g = 0 for g.
0
Solve -7*p = -49*p for p.
0
Solve -8*y = -20*y - 108 for y.
-9
Solve -32 = -9*w - 5 for w.
3
Solve -406 = -16*f - 454 for f.
-3