Solve -4*a - 20 = 4*u, 93*a - 94*a = -3*u - 15 for a.

0

Solve -y = -1, 3*v + 18*y = 19*y + 17 for v.

6

Solve -5*i = -2*s - 9, 3*s - 8*s = i + 9 for s.

-2

Solve -a + 0 = -2*y + 1, -3*y = -3*a for a.

1

Solve -20 = -4*d, 8*m - 4*m - 2*d = -18 for m.

-2

Solve 0 = 64*i - 61*i + y + 2, -i + y = 2 for i.

-1

Solve -4*s = 0, -o - 2*o + 5*s + 15 = 0 for o.

5

Solve -5*y - 10 + 4 = -l, 2 = 5*y - 3*l for y.

-2

Solve n + 5*a = -4*n + 30, 0 = -n + 5*a - 6 for n.

4

Solve -12*r = -4*a - 11*r - 8, -5*a = 2*r + 10 for a.

-2