Solve 0 = 5*u + 4*n - 20, 5*u - n - n = -10 for u.

0

Solve -5*w - 5 = 3*g, -25 = 53*g - 54*g + 5*w for g.

5

Solve -3*z - 18 = -3*b, -8*b = -7*b + 4*z + 9 for b.

3

Solve 0 = 4*o - 3*o - 4*u + 9, -2*o - 4*u + 18 = 0 for o.

3

Solve -17*g - 2*l = -13*g - 16, -5*g = -l - 27 for g.

5

Solve 2*l - 8 = -3*u - 0*l, 0 = 2*u + 3*l - 12 for u.

0

Solve -2*a + 3 - 15 = 5*q, 0 = -3*a + 4*q + 28 for a.

4

Solve 2*c - 3*t - 21 = 0, 4*c = 9*t - 8*t + 17 for c.

3

Solve 0 = 3*z + 4*y + 6, 4*z + 5*y - 2*y + 1 = 0 for z.

2

Solve -3*x + b - 15 = 0, -21*b + 16*b + 25 = -5*x for x.

-5