Solve 4 = -2*u - 4*k - 12, 2*k = -5*u - 24 for u.

-4

Solve n = 2*m - 4, 5*m - 4 = 2*n + 2*n for m.

4

Solve -5*u + 6*u + 4*f = -9, 2*u - 3*f - 15 = 0 for u.

3

Solve 0 = o - 2*f, -2*o + 5 = f - 0 for o.

2

Solve -5*o - 22 = 4*x, -2 = o - 4*x - 12 for o.

-2

Solve 10 = -b - 3*c, 2*b - 67*c = -68*c - 15 for b.

-7

Solve 3*n - 21 = 3*y, -n + y = -3*y - 19 for n.

3

Solve 6 = -5*z + 3*b, 22 = 5*z - 26*b + 27*b for z.

3

Solve -2 = -a, 7 = j - 5*a + 12 for j.

5

Solve n + 5*z = -3*n - 1, 2*n = z + 3 for n.

1