Solve -4*k - 1 + 4 = -3*a, -2*a + 5*k - 9 = 0 for a.

3

Solve 6*n + 6 = 2*u, 0 = -63*n + 59*n - 4*u + 12 for n.

0

Solve 2*r + 6 = 79*f - 81*f, -15 = -5*f + 5*r for f.

0

Solve 11*s = 12*s, -5*y - 3*s + 25 = 0 for y.

5

Solve 9 = 2*l + 4*p - 5, 5*p = -4*l + 19 for l.

1

Solve -5*d - 3 - 7 = -b, -5*b = -5*d - 10 for b.

0

Solve -4*a + 12 = -4*c + 8, 0 = 3*c + 3*a - 33 for c.

5

Solve -2*d + 0*d = 3*f - 7, 5*d + 3*f - 4 = 0 for d.

-1

Solve -o + 6*a - 9 = 7*a, 0 = -3*a - 15 for o.

-4

Solve 0 = -b + d - 5, 0*b + 5*d = -5*b - 15 for b.

-4