Solve 2*d - 20 = -h - 25, d = -5*h - 25 for h.

-5

Solve -4*c + 5*y - 5 = 0, -2*y = 4*c - 7*c - 2 for c.

0

Solve 16 = 15*f - 12*f + 4*p, 15 = 5*f - 5*p for f.

4

Solve -3*j + 2*a + 18 = 5*a, -2*j - 4*a = -14 for j.

5

Solve m + 4 = 3*m, -5*n = 4*m + 17 for n.

-5

Solve -2*v = 3*u - 2, -2*u - 20 + 43 = -3*v for u.

4

Solve -2*k - 10 = g - 2*g, 5*g + 3*k + 15 = 0 for g.

0

Solve 31 = 4*n + 5*k, k - 3 = n - 4 for n.

4

Solve 0 = n - 5*r - 30, -4*n - 5*r + 3 - 33 = 0 for n.

0

Solve 4*b - m = 5, 0 = -b - m + 2*m - 1 for b.

2