Solve 2*d + 18 = 3*r + 1, 0 = -4*d - 4 for r.

5

Solve 19 = 5*c - s + 2, -s = 4*c - 10 for c.

3

Solve -5*n + 28 = p, 2*p - 4*n + 26 = 4*p for p.

3

Solve -4*t + 17 = -t + y, 2*y = 10 for t.

4

Solve -c = -2*c + 2*l + 9, 12 = -c - 5*l for c.

3

Solve 4*m = -2*z + 16, 21*z - 5*m = 23*z - 20 for z.

0

Solve -66*f + 70*f - 5*t = 27, 2*t = 3*f - 15 for f.

3

Solve -2*z = 3*h + 9, -2*z + 9 - 3 = 0 for h.

-5

Solve 2*t + 2*o - 3 = 3*t, 4*t - 3*o = -17 for t.

-5

Solve 1 = -2*r - d, 12*d = -2*r + 7*d + 19 for r.

-3