Solve 0 = 2*x - c - 4, -3*x + 7*x - 5*c - 20 = 0 for x.

0

Solve -2*u = 2*o - 8, o + 0 = 4*u - 1 for o.

3

Solve p - 4 = 0, r = -0*r + 4*p - 18 for r.

-2

Solve t - 2*v - 4 = 0, -4*t + 9*v = 8*v - 16 for t.

4

Solve p + 25 = -2*k + 7*k, 10 = 5*k + 2*p for k.

4

Solve -2*h = -4*f - 18, 5*f + 3*h = -2*h - 15 for f.

-4

Solve s + 2*s = r - 9, -4*r - 3*s = 24 for r.

-3

Solve 5*m + 1 - 20 = -3*x, -m = 3*x + 1 for x.

-2

Solve 9 = 5*s - 4*o, s = -5*o - 55 + 80 for s.

5

Solve 2*m = 2*x + 3*m - 14, -x = -3*m + 7 for x.

5