Solve 2*a - 23 = 5*u - 31, -4*a = -5*u + 6 for a.

Solve 4*z - 24 = 8*z - 4*f, 0 = 4*z + f + 19 for z.

-5

Solve -3*d - 21 - 2 = 5*s, -2*s + 4*d - 4 = 0 for s.

-4

Solve 0 = -3*q + 5*s - 17, 4*q - 378*s = -381*s - 13 for q.

-4

Solve -24 = -2*d + 9*y - 13*y, 28 = 2*d + 5*y for d.

4

Solve -4*k - 11 = -3*a, -5*a - 35 = 4*k - 0*k for k.

-5

Solve 4*b = -h - 15, 15*b - 12 = 14*b + 5*h for b.

-3

Solve 2*s + 163*d - 167*d = 28, 0 = 2*d + 16 for s.

-2

Solve 25*t - 10 = 26*t - 3*l, 3*l + 5 = 4*t for t.

5

Solve -7 = 3*r - 2*m, 0*m = 3*r + 5*m - 7 for r.

-1

Solve -4*q + 8*q - b = -9, b = 5 for q.

-1