Solve 0 = 3*r + 3*w + 27, -8 + 30 = -2*r - 3*w for r.

-5

Solve 3*v + 0*u = -u - 15, 4*u = -12 for v.

-4

Solve y - 5*k = -16, -90 = -2*y - 5*k - 77 for y.

-1

Solve 2*x + 4*b = 8, x - 17 = 2*x - 5*b for x.

-2

Solve -4*c - 5*k = 30, 28*k - 29*k = 4*c + 22 for c.

-5

Solve -4*x + 1 = -4*d - 11, -3*d - 2*x + 11 = 0 for d.

1

Solve -i + 12*a - 9*a = 9, 3*a = 9 for i.

0

Solve -4*z + 2*z = i + 5, 6 = -4*i - z for i.

-1

Solve -4*n = -5*f - 29 + 9, 0 = 2*f for n.

5

Solve 5*s = b + 6*s - 6, 0 = b - 3*s + 2 for b.

4