Solve 0 = 5*b - 5*f - 10, 5*b - 21*f - 10 = -13*f for b.

2

Solve 6*l = 2*l - 5*j - 21, -3*l + 3*j + 18 = 0 for l.

1

Solve 5*j - 10 = -5*t, -j - 2*t = t for j.

3

Solve 0 = 4*v + q - 21, 3*q - 18 = -3*v + 9 for v.

4

Solve -2 = -2*a - u, 3*a - 3*u + 7 = 8*a for a.

-1

Solve 3*c + 35 = -5*y, 2*y + 37 = 4*c + 23 for y.

-7

Solve -u + 7*m - 4*m = 17, -5*m = -20 for u.

-5

Solve 4*r = -5*h + 21, 125*r - 18 = -4*h + 123*r for h.

5

Solve -2*m - 2 = 4*j - 12, -5*m = j + 20 for m.

-5

Solve -3*o = -z - 18, 6 = 3*z - 0*o + 3*o for z.

-3