Solve 0 = 2*r + 4*p + 28, 18 = -3*r - 4*p - 14 for r.

-4

Solve 2*u - 15*i + 14 = -13*i, 0 = 5*i - 10 for u.

-5

Solve 0 = 4*n - 20, -2*c - 15*n + 10*n = -17 for c.

-4

Solve 0*a - 3 = 3*a - 3*r, -4*r - 21 = a for a.

-5

Solve 0 = -4*y - o - 16, y = -3*o + 8 - 1 for y.

-5

Solve 0*l + 2*l = 3*y - 8, -5*y = -4*l - 12 for y.

4

Solve -4*p + 8 = -4*c, 6*p - 8*p = 2*c + 4 for c.

-2

Solve -5*p - 30 = 5*v, -2*v - 1 - 5 = 0 for p.

-3

Solve -4*i - i = -5*j - 15, 11 = 3*i - j for i.

4

Solve v - 1 = d, d + 11*v = 7*v + 19 for d.

3