Solve 0 = 2*f - 5*j + 20, j - 5*j = -6*f + 6 for f.

5

Solve -q + 13 = -5*x, q + 59*x + 3 = 56*x for q.

3

Solve h = 2*v - 4 - 7, v = 3*h + 13 for v.

4

Solve 0 = -3*m - 5*o + 10, 2*m - 9*m = 5*o - 10 for m.

0

Solve 0 = -q - 3*r + 14, -q + 6 = -2*r + 12 for q.

2

Solve 2*u - 1 = n, 12*u - 16*u = n - 11 for u.

2

Solve -u = -2*h, u + 36*h - 31*h = 0 for u.

0

Solve 4*w + 5*d + 26 = 8*w, -3*w = -4*d - 20 for w.

4

Solve 0 = -2*b - 3*k + 4, 4*b - 10*b = 3*k for b.

-1

Solve 0 = -13*i + 9*i + 5*z + 10, z - 2 = 0 for i.

5