Solve -19*z + 4 = -20*z - 3*k, 5*k + 35 = 4*z for z.

5

Solve 4*k = 2*d - 5 + 17, -5*d - k = -25 for d.

4

Solve -2*a = 2*x, -7*a + 4*x - 9*x = -10 for a.

5

Solve 9 = 5*s - 4*t, 5*s - 10*s + 2*t = -17 for s.

5

Solve 3*r = 7*x + 19, 7 = 3*r + 3*x - 2 for r.

4

Solve -2*n - 2*n + 2*g = 6, 4*g = -20 for n.

-4

Solve 0 = -5*r + b - 32, 14*r - 9 = 17*r - 4*b for r.

-7

Solve 3*d - 4*d = 4*c + 4, -3 = -3*d + 3*c for d.

0

Solve -s - 4*a + 13 = 2, -2*a - 11 = -5*s for s.

3

Solve 22 = -5*o + 3*v, -5*v = -v + 4 for o.

-5