Solve 12 = 4*n - 2*t, -12 = -4*n - 6*t + 4*t for n.

3

Solve 2*n - 2*o = -6, -3*o = -n + 2*n + 7 for n.

-4

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

0

Solve 2*i = b + 5*i - 3, -5*b - 5*i + 15 = 0 for b.

3

Solve -5*m + 5*n - 40 = 0, 2*n + 20 = -m + 7*n for m.

-5

Solve 5*t + 31 = -4*b, -3*t = -b + 6 - 1 for b.

-4

Solve 2*x + 2*x = -2*a + 16, 4*x = 2*a for x.

2

Solve -4*d - 10 = a, 5*a - 6*a - d - 1 = 0 for a.

2

Solve 6 = q + 13, -a + 3*q + 18 = 0 for a.

-3

Solve 3*g + 3 = 0, -3*g = -2*v - 18 + 21 for v.

0