Solve 12 = 5*u - 3*x, 8 - 12 = -3*u + 5*x for u.

3

Solve -3*d - 4*n + 10 = 0, -20 = d - n - 21 for d.

2

Solve 2*f - 2*n + 10 = -0*f, 2*f = -3*n for f.

-3

Solve 65*w - 60*w - 10 = 3*a, 5*w = -3*a + 40 for a.

5

Solve 0 = -a - a + 4*l - 6, -2*l - 3 = a for a.

-3

Solve -s - 8 = -a, 4*s + 3*a = -s - 8 for s.

-4

Solve 4*l + 4*c - 20 = 0, 2*l - 5*c + 83 = 93 for l.

5

Solve -2*v + 5*l = -5, 2*l + 18 = 7*v - 3*v for v.

5

Solve 2*j - 13 = v, 5*j + 2*v + 22 = 7*j for j.

2

Solve -3*x = 4*g + 1, 9*x - 7 = 6*x + 4*g for x.

1