Solve 4*f + 5*h + 15 = 7*f, -10 = -2*f - 3*h for f.

5

Solve 0 = 6*l + 2*r - 6, 13*l + 5*r - 15 = 14*l for l.

0

Solve 3*i = -7*x + 9*x - 5, -18 = -5*x + 2*i for x.

4

Solve -4*q = 5*y - q + 6, 30 = -5*y + 5*q for y.

-3

Solve -2*y = -4*o, -4 = 37*o - 33*o - y for o.

-2

Solve 28 = -2*c + 5*m, m + 7 = -5*c - 9 for c.

-4

Solve -4*m + 2 = -5*d - 18, m - 16 = 4*d for d.

-4

Solve -16 = -4*u, b - 4 = -3*b - 4*u for b.

-3

Solve 0 = 5*q + 25, 0 = 9*a - 7*a - 5*q - 11 for a.

-7

Solve 7*l + 3*d + 30 = 10*l, 4*l + 5*d = -14 for l.

4