Solve g - 13 = 3*f, -5*g - 2 = 2*f + 1 for f.

-4

Solve -s - 4*s - 4*z = 5, 5*s - 2*z + 35 = 0 for s.

-5

Solve -v + 17*f - 19*f + 7 = 0, 0 = 2*v + f - 8 for v.

3

Solve d + 12 = -4*c + 4, 2*d + 12 = -4*c for d.

-4

Solve -3*s + 5*h + 19 = -21, 4*s - 5*h - 45 = 0 for s.

5

Solve -2*c + 2*v = -2, -4*c + 5 = -5*c - 2*v for c.

-1

Solve 7*v - 11*v + 2*w = 4, w - 2 = 4*v for v.

0

Solve 0 = -3*f - b + 2, 18*f - 12 = 22*f + 5*b for f.

2

Solve 2*q - 8 = -4*v + 2, -5*q = 4*v - 1 for q.

-3

Solve -i + 2*n = 0, 3*i + n = 8*i - 18 for i.

4