Solve -d = c - 4, 18*d - 19*d - 4*c + 19 = 0 for d.

-1

Solve -3*k = -2*t + 4*t - 1, 3 = t - k for t.

2

Solve -f - 4*i = 5, -4*f - 5*i = -i - 4 for f.

3

Solve q - 40 = -4*f - 3*q, 2*f - 5*q = -15 for f.

5

Solve -j + 4*l + 0*l - 13 = 0, -2*j = -l + 12 for j.

-5

Solve 2*f = 10, 2*u - 8*f - 20 = -10*f for u.

5

Solve 5*u + 5 = 3*n, -36 = 4*n + 4*u - 0 for n.

-5

Solve -4*g - 660*j + 657*j = 3, 0 = -3*g + 5*j + 5 for g.

0

Solve 5*r + 5*s - 35 = 0, -r - s - 3 = -5*s for r.

5

Solve 5*g + 2*k = 50 - 45, 3*g = -4*k - 11 for g.

3