Solve -5*u - 5*r - 45 = -0*r, 4*r = 4*u - 20 for u.

-2

Solve -11 = -4*w - 4*u - 15, -u + 15 = 5*w for w.

4

Solve u = 3*l - 6, 6*l - l + 5*u - 30 = 0 for l.

3

Solve -4 = -0*o - 2*o, -4*k = o - 6 for k.

1

Solve -3*z + 28 = 2*z + a, 0 = -5*z + 3*a + 16 for z.

5

Solve 0 = -u - 2*y - 1 + 2, u + 4*y + 3 = 0 for u.

5

Solve -36*w - 4*s = -32*w, 3*s + 30 = 3*w for w.

5

Solve 10*m = 5*m + 4*y + 10, -m - y + 2 = 0 for m.

2

Solve -5*w + o = 5, -w - 27 = o - 20 for w.

-2

Solve -f + 12 = -3*b, 3*f = 8*b - 3*b + 20 for b.

-4