Solve -z + 7 = -2*a + 8, -z - 1 = 4*a for a.

0

Solve r = -5*d - 9, -9*d = -7*d - 3*r + 7 for d.

-2

Solve 0 = -3*h + 3*u + 12, 2*h + 4*u = -6 - 4 for h.

1

Solve 5*b - 175*k + 177*k = 31, 4*b - 23 = -k for b.

5

Solve -2*t + v = -13, t - 3*v = 2*v + 11 for t.

6

Solve 3*t = -2*h - 12, -12*h + 3*t + 21 = -17*h for h.

-3

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

0

Solve -d + 13 = 3*k, -d + 0*k + k - 3 = 0 for d.

1

Solve -2*l + 13 = -2*w + 3, 2*w + 5*l = 11 for w.

-2

Solve 0 = c - 4*n - 4 - 11, 4*n = 5*c - 27 for c.

3