Solve 0 = -21*y + 16*y - 4*k - 21, -25 = 4*y - 5*k for y.

-5

Solve 11 = -2*u - 5*f, -f = 5*u - 12*u - 20 for u.

-3

Solve 4*q + 8 = 2*a + 3*q, -4*a + 4*q = -12 for a.

5

Solve 0 = -2*t + 5*u + 16, 2*t - 14 + 4 = 2*u for t.

3

Solve -11 = -4*m + y, m = 3*m + 2*y - 18 for m.

4

Solve 0 = -4*c - 2*p - 8, -15*c + 10*c = 3*p + 11 for c.

-1

Solve 4*d = -4, -19*j + 16*j = -2*d - 14 for j.

4

Solve 0 = -12*b + 15*b + 2*r + 2, 2*r = 4 for b.

-2

Solve 4*m = a - 21, m - 2*a + 1 = -13 for m.

-4

Solve -4*w - 5*l - 28 = 0, 3*w + l = -3*l - 22 for w.

-2