Solve 30 = 3*z + 3*s, -3*z + s = 2*z - 20 for z.

5

Solve -4*c - 57 = -5*g - 44, 4*c + 8 = 4*g for c.

3

Solve -4*r - 5*d = 3, 2*d = -4*r - 0*d - 6 for r.

-2

Solve -a - 4*n + 13 = 0, n = -4*a - 3*n + 16 for a.

1

Solve 6*a - 11*a = 3*j + 20, 4*a + 5*j = -16 for a.

-4

Solve 0 = -a - 5, -72*i + 3*a + 5 = -70*i for i.

-5

Solve 0 = -8*a + 5*a - 2*w + 1, 5*a - 7 = 2*w for a.

1

Solve b + 9 + 4 = -4*v, -b = 2*v + 5 for v.

-4

Solve -4*z - 3*s = z + 17, -4*z + 5*s = -16 for z.

-1

Solve 2*u - 3*k + 5 = -6, u - 2*k = -8 for u.

2