Solve 0 = -4*i - 20, u + 2*i = -2*i - 18 for u.

2

Solve -x + 4*k + 16 = 0, 14 = 5*x - 2*k - 12 for x.

4

Solve 3*q + 2*r - 16 = 0, -q + 0*r = r - 7 for q.

2

Solve -14 = -3*r - x, 4*r - 16 + 19 = 3*x for r.

3

Solve 2*c = -3*k - 8, 7*k = -c + 9*k - 4 for c.

-4

Solve v - 2*a - 15 = -0*v, -4*v + a + 25 = 0 for v.

5

Solve 5 = -5*u + 8*r - 11*r, 5*r = 0 for u.

-1

Solve 2*m + 2*x - 12 = -m, -2*x = -4*m + 16 for m.

4

Solve -3*l = -3*a - 24, -3*a - 13 - 6 = -2*l for l.

5

Solve r = 2*o + 10, -o + 6 = -4*o - 3*r for o.

-4