Solve -2*z + 4*c = -4, -15 = -4*z - 20*c + 21*c for z.

4

Solve -3*x - 3*q = -2*q - 14, -2*x + 2*q - 4 = 0 for x.

3

Solve x + o + 4 = 3, 0 = 4*o for x.

-1

Solve 3*d + 7*k + 9 = 4*k, 4*k = -2*d - 12 for d.

0

Solve 4*v = -2*s + 16, 32 = -6*s + 4*v - 0*v for s.

-2

Solve -r + 3*j = -j - 9, 0 = -5*r - 5*j - 30 for r.

-3

Solve -3*c - 15 = 5*w, -c - 13*w + 11*w = 5 for c.

-5

Solve -3*x + 223 - 237 = 5*b, -b - 10 = -3*x for x.

2

Solve 0 = -v + 5, -2*v + 9 + 11 = 5*r for r.

2

Solve 3*c = -3*b + 15, b + 1 = -0*b + 5*c for b.

4