Solve -4*f + 4*z = 20, 7*f + 20 = 8*f + 4*z for f.

0

Solve 0 = z - 3*i + 10 + 8, 4*i - 8 = -4*z for z.

-3

Solve v - x - 6 = 0, -6 = 5*v + x + 3*x for v.

2

Solve 0 = -5*a + 5*i - 40, 2*a - 3*a = 2*i - 1 for a.

-5

Solve -4*i = 3*r - 20, 2*r = 22 - 14 for i.

2

Solve 0 = -3*r + 3*a - 21, -10*a = -4*r - 11*a - 3 for r.

-2

Solve 7*s = 11*s + i + 4, 0 = -2*s + 4*i - 2 for s.

-1

Solve j + 2*l = 6*j, -4*j = l + 13 for j.

-2

Solve 12*g - 15 = -u + 7*g, u + 2*g = 3 for u.

-5

Solve 2*z - 5*a = -31, -3*z - 3 = 5*a - 19 for z.

-3