Solve 3*r - 5*x - 20 - 3 = 0, -2*r - 2*x - 6 = 0 for r.

1

Solve 5*i = -k + 10, -66*k + 63*k + 4*i - 27 = 0 for k.

-5

Solve 3*n - 9 = 2*r + 3, -1 = -2*n - r for n.

2

Solve -3*l + 3 = 3*f, f - 4*f + 3 = 5*l for l.

0

Solve -4*l + 5*o = 4, 19 - 14 = -5*l + 4*o for l.

-1

Solve 3 = p, -3*q + 5*p = 4 + 5 for q.

2

Solve 5*t + 11 = 3*f - 2, -5*f + 31 = t for f.

6

Solve -4*f + 2*r = -12, -f + 3 = 8*r - 10*r for f.

3

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

2

Solve 2*y + 2*y = 4*h, 0 = -5*h - 5*y - 10 for h.

-1