Solve 0 = -3*k + 3*d - 6, 3*k + 15*d - 12*d - 18 = 0 for k.

2

Solve 0 = -4*n - 2*b - 22, -19 = -6*n + 4*n + 5*b for n.

-3

Solve x = -9*d + 6*d + 18, 3*d = 2*x for d.

4

Solve 5*d + w - 11 = 0, 12 = -d - 4*w - 1 for d.

3

Solve 0 = 4*f - 3*n + 19, -2*f + 7*f = n - 21 for f.

-4

Solve -5*c + 10 = 5*o, -3*c + c = 2 for o.

3

Solve 4*w = -u - 10, -3*u - 4*w - 3 = 3 for u.

2

Solve -4*k + 20 = -5*c - 3, 0 = -5*k + 5*c + 25 for k.

2

Solve 4*j = 4*t - 17 - 11, 3*t = j + 13 for t.

3

Solve -5*z - 20 = -5*i + 5, 5*i - 19 = -z for i.

4