Solve 7 = -f - o, -f + 2*o = 8 - 7 for f.

-5

Solve -5*k + 12*b = 13*b - 1, 5*k - 3 = -3*b for k.

0

Solve -8*z + 3*w - 3 = -5*z, -2*z - w = -4 for z.

1

Solve 423*j - 428*j - 39 = -g, -j = -2*g + 15 for j.

-7

Solve 2*f - 5*d = 16, 3*f + 0*d = 5*d + 14 for f.

-2

Solve -u + 8 = -2*r + 2, -r = -3*u + 13 for u.

4

Solve 4*r + 5*n = 2*r, 4*n + 3 = -r for r.

5

Solve -20*m - 2*f = -23*m - 1, 2*m - 2*f + 4 = 0 for m.

3

Solve 79*w - 74*w = 3*r - 10, -2*r - 4 = 2*w for r.

0

Solve 0*n + n + 2*p = -3, -n + 4*p = 3 for n.

-3