Solve 15 = -0*d + 5*d - a, 41 = 4*d + 5*a for d.

4

Solve 3 = -5*v + 2*f, -43*v + 2*f - 1 = -40*v for v.

-1

Solve -2*w = 2*k - w - 5, -4*k = 5*w - 25 for k.

0

Solve u = 2*n - 10, -9 = 4*u - n - 4 for u.

0

Solve -1 = l, -217 = -2*h - 3*l - 216 for h.

2

Solve 0 = 3*l + 3*f + 3, 4*l + 5*f + 5 = 2 for l.

-2

Solve -23 = -2*u - 5*x, 5*u + 15 = 3*x - x for u.

-1

Solve 0 = n - 3*o - 1, -7*o = 5*n - 3*o - 24 for n.

4

Solve 0 = z + 3*u + 10, -2*z + 4*u - 8*u - 14 = 0 for z.

-1

Solve 4*w - 2*n + 14 = 0, 5*w + 17 = 5*n - 13 for w.

-1