Solve 9*d - 10*d - 21 = -5*v, -5*d + 5 = -3*v for v.

5

Solve -2*x + 4 = 5*f + 15, 5*f + 15 = 0 for x.

2

Solve 0 = 4*i + 3*j - 32, -581*i + 2*j = -585*i + 28 for i.

5

Solve 4*p - 7 = -2*g - 25, 0 = 2*p + 5*g + 5 for p.

-5

Solve 2*p + 16 = 3*i, -2*i + 6*i - 5*p = 26 for i.

4

Solve -5*b = 3*d - 1, 0*d - 2 = 2*d + 4*b for d.

7

Solve 0 = 5*q + 4*k + 19, 2*k = 2*q - 1 + 5 for q.

-3

Solve 0 = -2*z + 3*n + 6, z - 5*n - 12 = -3*z for z.

3

Solve 52*o - 4*i - 8 = 49*o, 0 = 4*i - 16 for o.

8

Solve 2*t + 3*f - 6 = 0, 3*t - 4 - 7 = -5*f for t.

-3