Solve -2*p + 3*w - 28 = -7*p, -2*w + 27 = 5*p for p.

5

Solve 2*w - 4*x - 9 = -w, -5*w + 10 = -5*x for w.

-1

Solve -165*h = -168*h + 9, h = -5*v + 13 for v.

2

Solve -x = 4*q - 12, 0 = 3*q - 5*x + 39 - 71 for q.

4

Solve -2*r + r = -2*n + 7, 3*r = -n + 7 for n.

4

Solve -5*c - d = -12, 8 = 6*c - 4*c + 2*d for c.

2

Solve -n - 4*o = 11, -4*n + 10*o - 5*o = -40 for n.

5

Solve 0 = -5*n + 2*y + 29, -10 = 5*n - 9*n - 5*y for n.

5

Solve -4 + 3 = -k + 5*r, -4 = 2*k - 4*r for k.

-4

Solve 0 = -4*r + 20, -22*c - r = -19*c - 8 for c.

1