Solve 0 = -o + 4*t - 6*t + 5, -2*t = -2*o - 20 for o.

-5

Solve -5*f - 13 = j, -2*f = f + 9 for j.

2

Solve 0 = f + 5*n - 15 + 39, 3*f + 3*n + 24 = 0 for f.

-4

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

0

Solve 4*o + 16 = -r, -2*o + 21 = 2*r + 29 for r.

0

Solve 3*l - 8*l = -2*f + 14, -10 = 4*l - 2*f for l.

-4

Solve -2*p = 3*i + 12, -p + 4*i - 8*i = 16 for p.

0

Solve -5 = -4*q + 6*q + 5*r, 3*r + 7 = -2*q for q.

-5

Solve 4*f + 50 = -5*i + 14, -2*f - 3*i = 20 for f.

-4

Solve 5*z + 5*f - 10 = 0, 8*z - 5*z - 5*f = -2 for z.

1