Solve -h + 5*r - 2 = 7, -2*h = -5*r + 13 for h.

-4

Solve -3*u = 4*z - 15, 0 = -15*z + 20*z for u.

5

Solve -p + 7 = 3*n, -2*n - p = -3*n + 9 for n.

4

Solve 0 = 2*s + 2*u - 3*u, -2*u = 2*s for s.

0

Solve -3*g - 1 = y + 12, 17 = -3*g + y for g.

-5

Solve 2*z + u = 9, -1 - 2 = -2*z + u for z.

3

Solve 0 = 4*x + 5*c - 2 - 2, 0 = -3*x + 5*c + 3 for x.

1

Solve 4*i = p - i + 7, 4 = 2*i for p.

3

Solve z = -4*a + 9, 5*z + 11*a - 10*a + 12 = 0 for z.

-3

Solve 0*p - 5*y = 3*p + 12, -3*y = 4*p + 16 for p.

-4