Solve 3*r = 2*c + 20, -c - 18*r = -17*r for c.

-4

Solve -3*m - 28 = 5*q + m, 5*m - 6 = 4*q for q.

-4

Solve 5*r = l - 7, -76*r + 73*r = 2*l - 1 for l.

2

Solve -4*d - 13 = -3*i, -i - 4*d + 5*d + 3 = 0 for i.

-1

Solve 1 = -3*r - 3*f - 2, 2*r - f = 13 for r.

4

Solve -2*t = -a + 8 - 1, 5*t = a - 19 for t.

-4

Solve -5*m - 2 = -r, 0*r + 6 = 3*r for m.

0

Solve -q + 57 - 61 = 0, -3*s + 4 = 2*q for s.

4

Solve 4*o - 37 = 5*b, -8 - 3 = -2*o - 5*b for o.

8

Solve 0 = -n - 3*t - 1, 3*n + 5*t + 11 = 4*t for n.

-4