Solve -r + 1 = -v, v = -r + 13 - 6 for v.

3

Solve -2*a + 4*i = -a + 1, 0 = -4*a - i - 21 for a.

-5

Solve 5*c + o = 4*o - 28, 2*o - 2 = 0 for c.

-5

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

3

Solve 5*h = -z + 3, -28*z + h + 12 = -24*z for z.

3

Solve -c - 68*w + 71*w = -5, -w = 1 for c.

2

Solve 9 = 2*q + h, -2*q + h - 8 = -15 for q.

4

Solve -4*h + 3 = a, 2*h = -5*a - 21 - 0 for a.

-5

Solve -5*n + b - 9 - 3 = 0, -4*b = 12 for n.

-3

Solve -2*g + 5*a + 10 = -16, 5*a + 23 = g for g.

3