Solve 5*x + 35 = -4*k, 0 = 2*k + k + 5*x + 30 for k.

-5

Solve -7 = -2*u - 3*d - 1, -d = 2*u - 2 for u.

0

Solve 4*w + 5*z = 25, 5*z - 3 = -3*w + 22 for w.

0

Solve -20 = -3*z - n, -8*z = -12*z - n + 25 for z.

5

Solve 6*v - v + 20 = 0, 2*w = -3*v - 22 for w.

-5

Solve 19 = -a + 5*f, -2*f + f + 7 = -a for a.

-4

Solve -o = 2*s + 4, -219*s + 8 = -223*s + o for s.

-2

Solve 135*o = 132*o, -o = -l - 4 for l.

-4

Solve 18 = -4*y + 2*o, 0 = -0*y + y - 3*o + 12 for y.

-3

Solve -3*p + 1 = 3*v + 2*v, -2*p + 4 = 5*v for p.

-3