Solve -c - 20 = 5*d, 0 = d - 2*c - 2*c + 4 for d.

-4

Solve 4*r = -5*f - 0*f - 21, f = 2*r - 7 for f.

-5

Solve -2*v = 6, -2*o - 12 + 5 = 5*v for o.

4

Solve -3*g = -20*u + 22*u - 3, -2*g + 4*u + 18 = 0 for g.

3

Solve 2*r = 4*k - 3*r - 16, 0 = 3*r + 12 for k.

-1

Solve -3*d = 3*b + 9, -3*d + 6*b - 2*b = -19 for d.

1

Solve -19 + 5 = 5*g - 3*k, -3*k + 10 = -g for g.

-1

Solve 4*j - 16 = 0, -6*t + 4*t - 5*j + 24 = 0 for t.

2

Solve -3*b = -2*o - 12, -10*o + 12 = -12*o - b for o.

-6

Solve 0 = 2*r - m + 9 - 1, 3*m = r - 6 for r.

-6