Solve 0 + 35 = -7*f for f.
-5
Solve -45*x = 44*x - 77*x for x.
0
Solve 7*r - 3*r = 20 for r.
5
Solve -b + 7 = 5 for b.
2
Solve -15*c - 130 = 11*c for c.
-5
Solve 16 + 2 = -6*k for k.
-3
Solve 3*q + 39 - 27 = 0 for q.
-4
Solve -u = -2*u for u.
0
Solve -312*h - 20 = -317*h for h.
4
Solve 49*s - 51*s - 4 = 0 for s.
-2