Solve -16 = -4*n - 4*a, -20*n + 20 = -15*n - a for n.

4

Solve 4 = -5*a - 3*c, 0 = 5*a + 4*c + 7 for a.

1

Solve -4*x = -4, -3*d = d + 2*x + 10 for d.

-3

Solve 0*u - 6 = 3*u - 3*r, u + 4 = 2*r for u.

0

Solve -15 = 5*q - 4*j, -q - 3*q - 4*j + 24 = 0 for q.

1

Solve 2*l = 2*f, -23*l + 21*l - f = 0 for l.

0

Solve -2*p + 6*p = -2*j + 6, -5*j - 4*p = 9 for j.

-5

Solve -y + 5*x - 18 = 0, 2*y + 4*x - 14 = 3*y for y.

2

Solve 5*n = -2*f - 22 + 35, -5*n + 3*f - 7 = 0 for n.

1

Solve -t + 15 = -4*j - 0*j, -3*t + 3*j = 0 for t.

-5