Solve 5*d - 3 = -r - 20, -4*d = 4*r + 20 for d.

-3

Solve -5*p + 4*q = -15, -p + 0*q = q - 3 for p.

3

Solve 3*n - 3*u + 18 = -6, 4*n = -4*u for n.

-4

Solve 2*w + 2 = 0, -3*w + 1 = -2*u - 6 for u.

-5

Solve 0 = 5*q - 0*q - m + 13, -17 = 5*q + m for q.

-3

Solve -4*u - 32 = 4*d, -1 = -3*u + 4*d + 10 for u.

-3

Solve 2*f + s - 2 = f, -2 = 4*f + 2*s for f.

-3

Solve 4*u - 10 = 3*l, 3*u - 8*l = -6*l + 7 for u.

1

Solve 2*s - 10 = 4*s - 4*x, 0 = -5*s - 3*x + 14 for s.

1

Solve -o - 4 = -c, 2*o - 7 = -2*c - 3 for o.

-1