Solve 0 = 2*z - 2*o, -4*z + 6 = 9*o - 10*o for z.

2

Solve -25*r = -21*r + 2*a - 16, 5*r - 27 = a for r.

5

Solve 12 + 5 = 3*q + 2*s, 4*q = -s + 21 for q.

5

Solve -3*j - 4 = -5*x - 21, 0 = -3*j - 3*x + 9 for j.

4

Solve 13*f - 17*f = -7*l - 7, -f - 2*l = 2 for f.

0

Solve -f = 3*y - 3, -3*f + y = 2*y - 9 for f.

3

Solve 0 = 5*d - 0*v + 3*v + 25, -5*v = 5*d + 35 for d.

-2

Solve 0 = -4*m, -4*b + 5*b + 5*m + 6 = 0 for b.

-6

Solve 4*n = 2*h - 6*h - 12, 2*h - 22 = 5*n for n.

-4

Solve -c + 10 = -x, 58 = -4*c + 78 for x.

-5