Solve 4*a - o = 12, 3*a + 4*o - 21 - 7 = 0 for a.

4

Solve -4*f + 3*f = o + 5, 4*o + f + 11 = 0 for o.

-2

Solve 2*q - 11 = v, 5*q + 0*v - 25 = 2*v for q.

3

Solve l + 28 = -5*q, 2*l = -2*l - 5*q - 37 for l.

-3

Solve 3*s + 19 = k, -5*s + k + 11 = 40 for s.

-5

Solve -12 = 4*m - 2*j, -2*m = -0*m + 4*j - 14 for m.

-1

Solve 3*w - 6 = 0, 5*k - 2*k - w = -8 for k.

-2

Solve 27 = y - 5*n, 0 = -y + 14*n - 13*n + 7 for y.

2

Solve 6 = -2*k + 2*r, -2*k - r = -k + 7 for k.

-5

Solve 14 = -2*i - 5*a, -3*a + 15 = -3*i - 6 for i.

-7